January 19, 2016 9:18 a.m.
This is a very sweet idea, +1!
March 5, 2016 2:37 a.m.
Actualy Grave Pact and Blood Artist trigger even if your opponent chooses to return the creature to your hand on Athreos. They all trigger "whenever a creature (you control/own) dies", so even if the creature is than returned to your hand, they still loose 1 life and have to sacrifice a creature.
March 11, 2016 6:31 a.m.
maybe Quest for the Gravelord, i just like getting 5/5 zombies for 1 mana, Deathgreeter is like a mini Blood Artist and Grim Haruspex lets you draw cards. Pawn of Ulamog gives you sacrificeable tokens when you sacrifice other things.