Avverone Cultist

Possessed, devastate (Whenever you discard a card
or lose life, this creature becomes indestructible until the
end of your next turn. If this creature would deal
combat damage to a player, it instead deals 1 damage
to that player for each card in his or her graveyard.)
Sacrifice a possessed creature you control: That
creature deals 1 damage to target player. That
player puts the top card of his or her library into
his or her graveyard.