i would consider putting in some more draw mechanics of some kind. I think Gitaxian Probe, would be a good option. It lets you draw a card, and you get to see the opponents hand so you know if you can lay down your heartless summoning. I think i would take out Sorin's Vengeance for it, because you will want to use you mana to throw down big creatures, and it doesn't benefit from the heartless summoning.
For a heartless demon deck there are not a lot of demons. I would say add more demons if your gonna call it a demon deck. It doesn't look bad at all though.
have you had a chance to play this deck? it looks pretty sweet.
I have heartless summoning deck that is demon based but i am just a stickler for decks names more then anything. The name and the cards in the deck just don't match to me. If your going to call it heartless demons run more then TWO demons at least. I also have a soft spot for Carnifax Demon once I realised two of them on the board at once can give infinite negative counters to all creatures provided you also have the mana lol. take a look at what I mean...
|Date added||2 years|
|Last updated||2 years|
|Legal formats||Legacy, Vintage, Commander / EDH|
|Illegal cards||Black Sun's Zenith , Ponder , Venser, the Sojourner , Perilous Myr , Darkslick Shores , Mana Leak , Phyrexian Metamorph , Rune-Scarred Demon , Frost Titan , Massacre Wurm , Solemn Simulacrum|