702.16b A creature with flying can't be blocked except by creatures with flying and/or reach. (See rule 509, "Declare Blockers Step," and rule 702.9, "Flying.")
702.16c Multiple instances of reach on the same creature are redundant.
Q: I have an old creature that says it "Can block creatures with flying" or that it "may/can block as though it had flying". Does this card have reach? A: Yes. When reach was introduced, all creatures with those abilities were given errata to have reach instead.
If you're not sure, be sure to check the Oracle text of your card; a card's Oracle text is its current, "official" wording, and overrides the printed text. (The Oracle text can be found by looking up the card in Gatherer .)
Q: Can a creature with reach block a card that "can't be blocked except by creatures with flying", such as Treetop Scout ? A: No. (Unless it has flying as well as reach, for some reason.) Having reach does not mean the creature has flying.
Q: Can a creature with reach block a card that "can't be blocked by creatures with flying", such as Gnat Alley Creeper ? A: Yes. (Unless it has flying as well as reach, for some reason.) Having reach does not mean the creature has flying.
And so people say to me, "How do I know if a word is real?" You know, anyone who's read a children's book knows that love makes things real. If you love a word, use it! That makes it real. Being in the dictionary is an artificial distinction; it doesn't make the word any more real than any other word. If you love a word, it becomes real. --Erin McKean, Redefining the Dictionary
702.69a Transfigure is an activated ability. "Transfigure [cost]" means "[Cost], Sacrifice this permanent: Search your library for a creature card with the same converted mana cost as this permanent and put it onto the battlefield. Then shuffle your library. Activate this ability only any time you could cast a sorcery."
Specific Questions
Q: What does transfigure do? A: During your main phase, when the stack is empty and you have priority, you may sacrifice a creature with transfigure and pay its transfigure cost. If you do, you search your library for a creature card with the same converted mana cost as the sacrificed creature and put it onto the battlefield.
Q: What can I find with transfigure? A: You can find any creature card with the same converted mana cost as the card with transfigure. Converted mana cost is independent of color--if you transfigure Fleshwrither , you can find Plague Sliver , Rumbling Slum , Ravenous Baloth , or even Dune-Brood Nephilim . As long as the total amount of mana is right, you can transfigure for it.
Q: I have a card on the battlefield that turns artifacts, enchantments, or lands into creatures. Will this let me transfigure my creature for artifacts, enchantments, or lands? A: Not unless they're naturally creatures as well. If a card that does such a thing doesn't state or imply otherwise, it's talking about only permanents on the battlefield. Cards in your library won't be affected, and therefore can't be found with transfigure.
And so people say to me, "How do I know if a word is real?" You know, anyone who's read a children's book knows that love makes things real. If you love a word, use it! That makes it real. Being in the dictionary is an artificial distinction; it doesn't make the word any more real than any other word. If you love a word, it becomes real. --Erin McKean, Redefining the Dictionary
Q: I have an old creature that says it can't be the target of spells or abilities. Does this card have shroud? A: Most probably, yes. When shroud was introduced, all old creatures with the exact same ability were given errata to have shroud instead. It's a good idea to read the card carefully, however. There are a few cards (not many, but some) with abilities that only stop them from being targeted by certain kinds of spells or abilities, such as Karplusan Strider , Spellbane Centaur , or Troll Ascetic . These cards do not have shroud.
Also note that Auras and Equipment follow the same rule; those that make the creature they're attached to completely untargetable grant shroud, while those that only protect from targeting by a specific kind of spell or ability do not.
If you're not sure, be sure to check the Oracle text of your card; a card's Oracle text is its current, "official" wording, and overrides the printed text. (The Oracle text can be found by looking up the card in Gatherer .)
Q: What does shroud protect against? A: Shroud will only protect against things that specifically use the word "target", or cards with keywords that target by definition. (If a card's keyword targets by definition, it will use the word "target" in its reminder text. If it doesn't have reminder text, you can look up a card with the same ability that does to see if the ability targets.) If the spell or ability doesn't target, shroud can do nothing to stop it.
For more information on targets, see the Targets and Targeting entry of the Main Rules Q&A FAQ.
Q: Does shroud function when the creature it's on isn't on the battlefield? (ie, Can I Zombify or Cancel something with shroud?) A: No, shroud doesn't work when the creature it's on isn't on the battlefield, so you can Zombify and Cancel those shroud creatures as much as you like.
For an ability (any ability) to work outside of the battlefield, it has to either define a characteristic of the card (like Transguild Courier , Woodland Changeling , or Maro), specifically say it works outside of the battlefield (like [c]Anger or Glory ) or else do something that would logically mean it has to function somewhere else (like Squee, Goblin Nabob --you can't exactly return Squee from your graveyard if he isn't there in the first place). If an ability doesn't say it works somewhere else, and it would make sense for that ability to work while it's on the battlefield, then it works only on the battlefield. Shroud is one such ability.
Q: My permanent has an Aura or Equipment attached to it, and then it gains shroud. Will the Aura/Equipment fall off? A: No. While Aura spells on the stack and the Equip ability target, being attached to another card isn't something that targets. While you won't be able to cast Auras or Equip Equipments to a permanent with shroud, ones already on it won't fall off.
Note that it is possible to put additional Auras on Equipment onto a creature with shroud, as long as you do it in a way that doesn't actually try to target the creature.
And so people say to me, "How do I know if a word is real?" You know, anyone who's read a children's book knows that love makes things real. If you love a word, use it! That makes it real. Being in the dictionary is an artificial distinction; it doesn't make the word any more real than any other word. If you love a word, it becomes real. --Erin McKean, Redefining the Dictionary
701.12a If the effect of a resolving spell or ability regenerates a permanent, it creates a replacement effect that protects the permanent the next time it would be destroyed this turn. In this case, "Regenerate [permanent]" means "The next time [permanent] would be destroyed this turn, instead remove all damage marked on it and tap it. If it's an attacking or blocking creature, remove it from combat."
701.12b If the effect of a static ability regenerates a permanent, it replaces destruction with an alternate effect each time that permanent would be destroyed. In this case, "Regenerate [permanent]" means "Instead remove all damage marked on [permanent] and tap it. If it's an attacking or blocking creature, remove it from combat."
701.12c Neither activating an ability that creates a regeneration shield nor casting a spell that creates a regeneration shield is the same as regenerating a permanent. Effects that say that a permanent can't be regenerated don't prevent such abilities from being activated or such spells from being cast; rather, they prevent regeneration shields from having any effect.
Specific Questions
Q: When I regenerate a creature, does that mean it comes from the graveyard back onto the battlefield? A: No. Regeneration does not reanimate dead creatures; it can only save living ones from being destroyed. Only creatures on the battlefield can be regenerated. Read on to find out how regeneration actually works.
Q: What is regeneration and how does it work? A: "Regenerate [permanent]" means "The next time [permanent] would be destroyed this turn, instead remove all damage from it, tap it, and (if it's in combat) remove it from combat." Note that only two things "destroy" creatures: lethal damage and spells and abilities that use the word "destroy". Anything else does not "destroy" things and cannot be stopped by regeneration.
To see how regeneration works, let's look at a couple of examples:
Example 1: You control a Drudge Skeletons . You attack with them, and your opponent blocks them with a2/2 creature . You pay to activate the ability of the Skeletons. This sets up a "regeneration shield" that will save the Skeletons the next time they would be destroyed. The Skeletons are then dealt 2 damage by the 2/2, which would be enough to destroy them, but since they have a regeneration shield, instead you remove all the damage from them and remove them from combat. (They're already tapped.) The 2/2 creature takes 1 point of damage: not enough to destroy it.
Note that in the above example, if your opponent later deals damage to the Skeletons, they are destroyed, because the shield was used up. If you wanted to stop this, you would have to activate the ability again to put another regeneration shield on.
Example 2: You control a Drudge Skeletons . Your opponent casts Mortify targetting the Skeletons. In response, you pay to activate the ability of the Skeletons. This sets up a "regeneration shield" that will save the Skeletons the next time they would be destroyed. Mortify then resolves, and tries to destroy the Skeletons. Instead, the shield gets used up, the skeletons become tapped and they get removed from combat (if they were in combat). If there had been damage on them, it would have been removed as well.
Q: Do Auras, Equipment, and counters fall off of the creature? Do things that would trigger off of it leaving the battlefield trigger? A: No. Regeneration replaces the act of destroying the creature with tapping it, removing damage from it, et cetera. The creature never actually leaves the battlefield, so any Auras, Equipment and counters on the creature remain there, anything that would trigger on it leaving the battlefield doesn't trigger, and any effects that were applying to it (such as Giant Growth cast earlier in the turn, for example) continue to do so.
Q: When can I activate a regeneration ability? Can I cast it multiple times? A: You can activate any activated ability, including those that create regeneration shields, any time you have priority, and as many times as you can pay for it, unless the ability specifically says otherwise. Normally players will only activate regeneration abilities in response to something that would cause the shield to be used up, but you can do it at other times if you wish.
Note that abilities that create regeneration shields, but aren't activated abilities (such as Duskworker 's ability), don't have the same sort of flexibility.
Q: When is a creature actually "regenerated"? Is it when I activate the ability, or when the shield is used? A: A creature isn't actually "regenerated" until the shield is used up. This is important for creatures such as Skeleton Scavengers and Debt of Loyalty .
Q: Does regeneration save my creature from sacrificing, or from effects that exile it or reduce its toughness to 0? A: No. Regeneration only saves a creature from being destroyed, and none of those things are destroying the creature. If the creature would be removed from the battlefield in some way other than being destroyed, regeneration can't stop it.
Q: How does regeneration interact with Deathtouch? What happens when something with deathtouch deals damage to a creature that can regenerate? A: Regeneration can save a creature from deathtouch; deathtouch uses the word "destroy", so it's something regeneration can stop.
Q: How does regeneration interact with Wither? Can I regenerate from -1/-1 counters? A: Wither generally kills regenerators dead; regenerating won't save them and won't remove the counters accumulated thanks to wither. Wither causes -1/-1 counters to be put on the creature, and if the creature accumulates enough of them, its toughness will be 0 or less, which regeneration can't save the creature from.
And so people say to me, "How do I know if a word is real?" You know, anyone who's read a children's book knows that love makes things real. If you love a word, use it! That makes it real. Being in the dictionary is an artificial distinction; it doesn't make the word any more real than any other word. If you love a word, it becomes real. --Erin McKean, Redefining the Dictionary
701.20a To clash, a player reveals the top card of his or her library. That player may then put that card on the bottom of his or her library.
701.20b "Clash with an opponent" means "Choose an opponent. You and that opponent each clash."
701.20c A player wins a clash if that player revealed a card with a higher converted mana cost than all other cards revealed in that clash.
Specific Questions
Q: What does clash mean? A: To clash with another player is to have both players reveal the top card of their library, then put it on the top or bottom of their library. A player wins a clash if his card had a higher converted mana cost than any other card revealed this way.
Q: What happens when there's a tie? A: A player only wins a clash if his card had a higher converted mana cost than any other players' card. If there's a tie, no players' card had a higher converted mana cost, so nobody wins.
Q: How does clashing work in multiplayer? A: In a multiplayer game, when asked to "clash with an opponent", you choose one (and only one) opponent with which to clash, and the two of you clash in the same way that you would in a two-player game. The other players do nothing--they are not clashing.
You decide which opponent to clash with during the resolution of whichever spell or ability is causing you to clash; at the time players can respond to your spell or ability, they will not know for certain who you will choose to clash with. Players cannot respond with spells or abilities in between you deciding who to clash with and the actual clash occurring. (But of course, you can't try to stop them from being able to respond by jumping ahead of yourself and telling them who you intend to choose--Magic is not a game of reflexes.)
Q: Something triggers when I clash. Does it count when my opponent clashes with me as well as the other way around? And does that trigger happen before or after the clash does? A: Yes, it counts no matter who caused the clash, and the trigger will happen after. Something that triggers on a particular event occurring will always happen after the event that triggered it. (It can't happen before, because it hasn't triggered yet.)
Q: What happens if the card I reveal has no mana cost or has an in its mana cost? A: A card with no mana cost has a converted mana cost of 0, and an in the mana cost of a card that's not being cast counts as 0. So a Blaze revealed during a clash will have converted mana cost of 1.
Q: Who decides where to put their card first? Can I wait to see where my opponent puts his card after clashing before deciding where to put mine? A: Players decide where to put their revealed cards in turn order, starting with the player whose turn it currently is. (Who may or may not be the person who started the clash.) Players will know the decisions of players who chose before them when it becomes time for them to choose. Then all the cards are moved simultaneously.
Q: What happens if someone reveals a split card? A: Split cards have two separate converted mana costs, so something weird will happen. Let's assume you're the one who revealed the split card. Each half of the card counts separately; if one of your split card's halves has a converted mana cost higher than that of your opponent's card, you win. If your opponent's card has a higher converted mana cost than that of one of your split card's halves, he will win.
So if you revealed a Dead // Gone and your opponent revealed a Grizzly Bears , both of you would win, because the Gone half's converted mana cost of 3 is greater than the Bears's CMC of 2, and his Bears's 2 is greater than the Dead half's 1.
And so people say to me, "How do I know if a word is real?" You know, anyone who's read a children's book knows that love makes things real. If you love a word, use it! That makes it real. Being in the dictionary is an artificial distinction; it doesn't make the word any more real than any other word. If you love a word, it becomes real. --Erin McKean, Redefining the Dictionary
702.70a Champion represents two triggered abilities. "Champion an [object]" means "When this permanent enters the battlefield, sacrifice it unless you exile another [object] you control" and "When this permanent leaves the battlefield, return the exiled card to the battlefield under its owner's control."
702.70b The two abilities represented by champion are linked. See rule 607, "Linked Abilities."
702.70c A permanent is "championed" by another permanent if the latter exiles the former as the direct result of a champion ability.
Specific Questions
Q: What does champion do? A: Champion allows you to "upgrade" your creatures by essentially replacing them with bigger, stronger creatures. When a creature that says "champion a {foo}" enters the battlefield, you must sacrifice it unless you exile some other {foo} you control. That {foo} is "championed" by the creature with champion. When the creature with champion leaves the battlefield, the championed {foo} comes back onto the battlefield under its owner's control.
Q: I cast a creature with champion, and in response to the remove-trigger, something kills the permanent I was going to champion. What happens? A: Not much, as long as you have at least one other thing you could champion.
You don't choose which permanent to champion until the champion ability actually resolves, and by the time that happens, it's too late for anyone (including you) to try to do anything about it. There's no time in between you choosing which permanent to champion and actually championing it in which anybody can do anything about it.
Q: Do I get the championed {foo} back if my champion creature is bounced? Exiled? Put into my library? A: Yes. You get the championed {foo} back whenever the creature with champion leaves the battlefield, no matter how it does so or where it goes when it does.
Q: Can I respond to the champion trigger by doing something with my creature? Say, sacrifice it to Greater Gargadon or Nantuko Husk ? A: Absolutely. Champion's trigger works just like any other triggered ability, and can be responded to just fine by activating any abilities or casting any instants you like.
Q: Will using a spell or ability to remove the champion ability just as soon as my creature enters the battlefield stop me from having to champion something? Would removing it just before it left the battlefield stop me from getting the thing I championed back? A: No and yes, respectively. When something with champion enters the battlefield, by the time players get the chance to cast things that could possibly remove the champion ability, the ability has already triggered, and removing the ability won't stop the instance that has already triggered.
On the other hand, removing the champion ability just before a champion creature leaves the battlefield will prevent the trigger from ever triggering, because at the time the creature leaves the battlefield, it doesn't have champion. Be careful, though, because if the creature is being removed from the battlefield as a cost to cast some spell or activate an ability, you won't get the chance to respond before the creature is already gone and the champion leaves-the-battlefield trigger has triggered and gone onto the stack.
And so people say to me, "How do I know if a word is real?" You know, anyone who's read a children's book knows that love makes things real. If you love a word, use it! That makes it real. Being in the dictionary is an artificial distinction; it doesn't make the word any more real than any other word. If you love a word, it becomes real. --Erin McKean, Redefining the Dictionary
702.71a Changeling is a characteristic-defining ability. "Changeling" means "This object is every creature type." This ability works everywhere, even outside the game. See rule 604.3.
702.71b Multiple instances of changeling on the same object are redundant.
Specific Questions
Q: What does changeling do? A: A creature or tribal card with changeling is all creature types at all times, no matter where it happens to be.
Q: Is a creature or tribal card with changeling just all races, or is it all classes as well? A: While some people see a flavor distinction between creature types that describe species (so-called "races") and creature types that describe function (so-called "classes"), as far as the rules are concerned, there is no difference whatsoever between the two--they're all just plain old creature types, no matter whether they happen to describe species or function, and a card with changeling will have them all; see the link below.
Q: So what types is my card with changeling? Is it a... A: Cards with changeling have all creature types; however, note that changeling doesn't give them anything that isn't a creature type. For a full listing of existing creature types, see this post--your changeling creature is all of the types listed under the bullet labeled "creature types".
So if something asks your changeling if it's one of those types, it will say "yes".
Note:"Artifact" is not a creature type; it is a card type. Changeling does not make the card it's on an artifact.
Q: All creature types? So creatures with changeling are walls? Does that mean they can't attack? A: They are walls, but that isn't going to stop them from attacking. The rule that said walls can't attack was removed more than half a decade ago--all existing walls at the time were given the defender ability instead. (Which does the same thing, but as a keyword instead of being tied to the wall creature type.)
Being a Wall no longer has any special meaning according to the rules.
Q: So what about "Legend"? Are creatures with changeling Legends? A: No, they are not. The Legend creature type no longer exists; it was eliminated at the same time the wall rule was removed. All the creatures with that type were erratad to have the supertype "legendary" instead, which does the same thing. (Note that the legend rule was changed at that time as well, so if you hadn't heard about that, be sure to check that out as well.)
Q: How do creatures with changeling interact with Coat of Arms ? A: If a Coat of Arms is on the battlefield, a creature with changeling will get +1/+1 for every other creature on the battlefield that has at least one creature type. It will not get a bonus based on the number of creature types it has, because that's not how Coat of Arms works; see the Coat of Arms FAQ entry for more information.
Q: How does changeling work with effects that remove abilities? A: Strangely. The Layer System, which defines how effects that interact with an objet's characteristics work, states that effects which alter creature types are applied before effects that add or remove abilities. (And removing an ability after it has already applied will do nothing.)
So if you Ovinize , for example, a creature with changeling, it will no longer have changeling, but it will still be all creature types because Changeling gets applied before Ovinize's effect has a chance to remove it.
Q: I cast a card that causes a card with changeling to become a particular creature type. Is it still all creature types? A: No. When something sets something's creature type to a specific type without specifying otherwise, it removes all the object's other creature types. This doesn't mean that it loses changeling; changeling's effect is simply overwritten.
This answer also applies to effects which remove all of an object's creature types.
And so people say to me, "How do I know if a word is real?" You know, anyone who's read a children's book knows that love makes things real. If you love a word, use it! That makes it real. Being in the dictionary is an artificial distinction; it doesn't make the word any more real than any other word. If you love a word, it becomes real. --Erin McKean, Redefining the Dictionary
702.72a Evoke represents two abilities: a static ability that functions in any zone from which the card with evoke can be cast and a triggered ability that functions on the battlefield. "Evoke [cost]" means "You may cast this card by paying [cost] rather than paying its mana cost" and "When this permanent enters the battlefield, if its evoke cost was paid, its controller sacrifices it." Paying a card's evoke cost follows the rules for paying alternative costs in rules 601.2b and 601.2e-g.
Specific Questions
Q: What does evoke do? A: Evoke is an alternate cost that you can use to cast the card it's on. When the card enters the battlefield, (evoke appears only on permanent cards) if the evoke cost was paid, you must sacrifice the permanent. But that's okay, because all of the cards printed with evoke have triggered abilities that give you a benefit even though the creature doesn't stick around.
Q: Does evoke change when I can cast my spell or where I can cast it from? A: No. You're still casting the card with evoke the exact same way you would otherwise; the only difference is that you pay a different cost.
Q: Does evoke alter the mana cost or converted mana cost of my spell? A: No. A spell's mana cost, and thus its converted mana cost, is determined solely by what's printed in the upper right hand corner of the card, not by what you actually spent to cast the spell.
Q: Do effects that alter the amount a card costs to cast affect its evoke cost, too? A: Yes. Effects that alter costs are changing the amount you have to pay, not the card's mana cost; they always apply no matter whether you're paying the normal cost or the evoke cost.
Q: When I evoke a creature with an enters-the-battlefield ability, does the evoked creature get sacrificed first, or do I get its enters-the-battlefield ability, then sacrifice it? A: Whichever you want. You control both triggered abilities and they trigger at the exact same time, so you get to choose the order they resolve in.
Q: Can I respond to the sacrifice part of evoke by doing something with my creature? Say, sacrifice it to Greater Gargadon or Nantuko Husk ? A: Absolutely. Evoke's sacrifice trigger works just like any other triggered ability, and can be responded to just fine by activating any abilities or casting any instants you like.
Q: If I evoke a creature, what happens if I cast Momentary Blink (or a similar spell) in response to evoke's sacrifice trigger? A: The creature will be exiled, then come back onto the battlefield. It will be considered a completely different permanent than the one that just left, and you didn't pay its evoke cost that time, so you won't have to sacrifice it.
And so people say to me, "How do I know if a word is real?" You know, anyone who's read a children's book knows that love makes things real. If you love a word, use it! That makes it real. Being in the dictionary is an artificial distinction; it doesn't make the word any more real than any other word. If you love a word, it becomes real. --Erin McKean, Redefining the Dictionary
702.73a Hideaway represents a static ability and a triggered ability. "Hideaway" means "This permanent enters the battlefield tapped" and "When this permanent enters the battlefield, look at the top four cards of your library. Exile one of them face down and put the rest on the bottom of your library in any order. The exiled card gains 'Any player who has controlled the permanent that exiled this card may look at this card in the exile zone.'"
Specific Questions
Q: What does hideaway do? A: Hideaway does two things. First, the permanent with hideaway will always enter the battlefield tapped. Second, when the permanent with hideaway enters the battlefield, you look at the top four cards of your library. You pick one and exile it face-down, then put the rest on the bottom of your library in any order. As long as the card you exiled this way remains exiled, any player who has controlled the permanent with hideaway at any point can look at it. (Anyone who hasn't, can't.)
Q: Is hideaway optional? A: No. You're forced to look at the top four cards of your library and exile one. If there's less than four, you look at all of them and exile one.
Q: If the hideaway permanent leaves the battlefield, then later comes back, will I be able to access the card that it exiled the first time? A: No. When something changes zones, it forgets all about its previous existence; the game considers the new hideaway card to be completely different from the old hideaway card. Thus, you won't be able to use the card exiled by it the first time, only the one it exiled this time.
And so people say to me, "How do I know if a word is real?" You know, anyone who's read a children's book knows that love makes things real. If you love a word, use it! That makes it real. Being in the dictionary is an artificial distinction; it doesn't make the word any more real than any other word. If you love a word, it becomes real. --Erin McKean, Redefining the Dictionary
702.74a Prowl is a static ability that functions on the stack. "Prowl [cost]" means "You may pay [cost] rather than pay this spell's mana cost if a player was dealt combat damage this turn by a source that, at the time it dealt that damage, was under your control and had any of this spell's creature types." Paying a spell's prowl cost follows the rules for paying alternative costs in rules 601.2b and 601.2e-g.
Specific Questions
Q: What does prowl do? A: Prowl is an alternate cost that allows you to pay a spell's prowl cost rather than its mana cost if you have dealt combat damage to an opponent with a creature that shares a creature type with the prowl card.
Q: Does prowl change when I can cast my spell or where I can cast it from? A: No. You're still casting the card with prowl the exact same way you would otherwise; the only difference is that you pay a different cost.
Q: Does prowl alter the mana cost or converted mana cost of my spell? A: No. A spell's mana cost, and thus its converted mana cost, is determined solely by what's printed in the upper right hand corner of the card, not by what you actually spent to cast the spell.
Q: Do effects that alter the amount a card costs to cast affect its prowl cost, too? A: Yes. Effects that alter costs are changing the amount you have to pay, not the card's mana cost; they always apply no matter whether you're paying the normal cost or the prowl cost.
Q: Do I have to cast the card for its prowl cost if I match its conditions? A: No. Paying the prowl cost rather than the mana cost is completely optional; you can pay the normal mana cost rather than the prowl cost if you wish.
Q: What happens if things change control or change creature types? A: All that prowl cares about is that the creature dealt damage, and that at the time it did so, you controlled it and it had a creature type that the spell with prowl currently has.
If the creature's type or control has changed since it dealt the damage, that doesn't matter. If it changed before the damage was dealt, that is important and will affect whether or not you can pay prowl costs.
Q: Is prowl's reminder text accurate? It mentions specific creature types... A: Not entirely, no. The reminder text does mention specific creature types, but that's only done for convenience. Only the creature types that the prowl card currently has matter.
For example, if you have a Conspiracy on the battlefield naming "Brushwagg", and you deal combat damage to an opponent with one of your creatures, then try to cast a creature spell with prowl, you will be able to pay its prowl cost, even though the creature is a Brushwagg, not a Rogue or a Faerie or whatever else is listed in the reminder text. This is because both the creature and the spell share a creature type: Brushwagg.
And so people say to me, "How do I know if a word is real?" You know, anyone who's read a children's book knows that love makes things real. If you love a word, use it! That makes it real. Being in the dictionary is an artificial distinction; it doesn't make the word any more real than any other word. If you love a word, it becomes real. --Erin McKean, Redefining the Dictionary
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