Heartless Aggression

You realize Back from the Brink won't be effected by Heartless Summoning right?

Yeah, but I'm not sure of another blanket "bring em back from the yard" card. Suggestions?

Myr Galvanizer seems out of place. Maybe replace him with something like Skinrender. Entomber Exarch is another good choice.

Sheoldred, Whispering One is an amazing chick for bringing your guys back, and kills their dudes, too. If you can get two or three, that'd help you a lot.

Four Myr Superion is too many. I would say that two of them would be about right.

Oh, also, your sideboard has to be either 0 cards, or 15. I mention it because you said you were new, and might not know.

If you have the 4x Darkslick Shores and 4x Drowned Catacomb they should already be in your deck, take out 4 Swamp and 4 Island.

Surgical Extraction is better than Memoricide because it only costs 1 phyrexian black mana and does the same.

If you want cards in your graveyard, use Forbidden Alchemy over ponder, plus it has flashback. Vengeful Pharaoh is great in your graveyard.

I don't have the duals...wishlist for sure, but not for a deck like this.

What is not for a deck like this?

Another reason to use Forbidden Alchemy over Ponder is that it is an instant versus a sorcery.

I love how Heartless Summoning makes cards like Pierce Strider completely playable!

+1 for your creativity using this awesome card :D