Here goes me and my black-white, black-blue and black-red bias:
1:
Spoiler:
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That is an Orzhov Basilika Guard.
Dimir infiltrator. Perhaps monoblue, run of the mill "1/2 draw on combat damage" with unblockable and possibly even hexproof.
Seing that he carries an Orzhov document -- it may mill one, draw one.
Manacost 2UU or 4U.
Alternatively, it is a sorcery "3U: Target creature becomes unblockable this turn. Whenever that creature deals combat damage to a player this turn, draw a card."
or even:
"2UU: Draw a card. Cipher"
2:
Spoiler:
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Does not look red at all. At least not like a red spell. Does not look black and white. Does not look green nor blue. Red and white it is. That creature is definitely exiled from taking damage. It's not a large creature, and it's definitely instant or out of combat. Sooo: Run of the mill "red and white damage exiles target creature that dealt damage". It looks like they are heading AWAY from a battle that has occured, an hour ago, so it may be a revenge spell. Or even revenge enchantment, possibly a countdown enchantment that is triggered at the end of turn or at the start of an upkeep. "Spontaneous combustion".
4: Boros 2/2, Batallion: 2 damage to target creature.
Alternatively, "Target creature gains +4/+0 and trample. Sacrifice that creature at end of combat."
6: Simic with swampwalk. But could be swamp and forestwalk combined -- or even swamp, forest and islandwalk.
7: Extort artifact angel with deathtouch and defender?
Extort artifact that makes opponents lose life whenever a creature dies?
Here's to hoping it's a rare Orzhov enchantment in white and black that causes the target to become pacifistic, unable to activate abilites AND drains it's controller for life with extort.
2WB: Enchanted creature can't attack or block, and it's activated abilities cannot be activated. Extort.
4: Artifact -- Extort, 2WB: ~Cardname becomes a 2/4 angel with deathtouch, defender and lifelink until end of turn.
8: Awww... Poor thing!
I can't even imagine who would do such a thing or why it's out there...
Disarm?... I just can't think of anything but wanting to give that little guy his spear back and putting him on top of a doorway.
9: An unfair fight in red? Possibly one fight each of your end of turns.
10: I'm bored now, and this looks very strange.
It does not appear to target any creatures or lands directly.
11: Boros 4/4 defender giant with first strike??
12: Very peculiar art. Both "creatures" are "human"-ish.
The woman is sitting NEXT to a person, extracting something from his mind.
A discard 1 Cipher sorcery for 3UB??
13: Search your library for a creature with evolve??
14: Orzhov wrath: XWB: Destroy each creature with toughness equal to or less than X.
15: Orzhov Zombie Legend that makes extort explode.
