Here, my opponents decision to cycle a shark in to block my Familiar was punished by this sequence: play second Oven, sac second Familiar to get my third food, reanimate Feasting Troll King, cast Great Henge for just two mana, tap it to cast Uro and trigger Henge, sac Uro to second Oven (with his triggers on the stack) for two more food, use food to reanimate both Familiars (two more Henge triggers)
Creature - Vampire Shaman Color tag templates(None) Serra Avatar Serra Avatar's power and toughness are each equal to your life total
Milling someone for 10 cards almost always seems to help them out because almost every single Commander deck has ways to abuse the graveyard nowadays
I can see it happening, to be sure
Its probably about to really pop and if a win condition like this makes Apostle (because you tutor for demons) more attractive than Rat Colony, people could build both decks (probably not) or build the older Shadowborn Apostle build which has upside if there are older cards in it