I'm really just spitballing this deck right now. The whole point is to use Heartless Summoning to get big guys out, then dump them, then toss them out again. I know the curve is pretty off, amongst other things, so any help is welcome. My budget is nothing over $5.
I would remove Phyrexian Reclamation in favor of card draw like Harmonize . Your big guys should do enough just by playing them, and Reclamation won't help you early in the game (it seems like more of a "win more" card). Reclamation would be better in a deck with smaller creatures, even with Heartless Summoning your creatures are going to be expensive because you have to pay an additional .
Lastly, I'm not exactly sure how you plan to get all your colored mana. Like DocGrog said, you have a lot of triple colored cards. You should favor creatures like Wurmcoil Engine that you can play no matter what. In fact, you might just want to go mono black. I'm not sure what the most effective way to ramp in black is thought (besides one-shot things like Cabal Ritual ). However, if you were black you could focus more on tutoring your Heartless Summoning .
Any accelleration you use should be in the 1 cmc slot. Abundant is not accelleration it is mana fixing. @ color decks do that with dual lands. Use wild growth instead but most heartless decks ahve no need of it at all.
I don't think you need to sac the summoning if you plan on keep dropping guys, if your men are already hugs -1/-1 is not a big deal.
Reiver Demon is cheaper then coco demon, but if also kills your guys if they are green. I like Terastodon as a fatty a lot, and it can kill your summoning if you really want that. Bloodgift Demon seems nice too because it comes out the turn after and starts drawing you into more cards.
Claws of Gix is great because it allows me to sacrifice my creatures with a smaller cost and it gives me something to play early. I figure I can do without card drawing and sacrificing since so many of my creatures already have some sort of draw ability. Caravan Vigil can let me get my mana together a lot faster.
I really want to keep Demon of Death's Gate because it has the potential to be a 5/5 flying trample for 3 black. Myr Superion is a great early game and still gives me some nice blocking late game.
Your deck is just going to roll over most of the time. You aren't always going to draw Heartless Summoning , and when you do you still aren't playing anything till turn four or five unless you drew a Myr Superion , and that's assuming you have the right colors.
You're probably right. It's just that the only tutors I can afford are Diabolic Tutor s and those cost four mana, so my chances of getting anything out before turn four are low anyway. Card draw is fine, but a Harmonize is still 3 green-which I might be able to play early if I can get a Wild Growth on the board. I suppose it wouldn't be terrible to swap out the Myr Superion with some Carven Caryatid s though.