Cthulhu Idol

Horror creatures get +2/+2.
At the beginning of Cthulhu's end step
reveal the top four cards of its library, if Cthulhu
is revealed this way, sacrifice Cthulhu Idol.
Put the rest on the bottom of Cthulhu's library.
Evict Evil - When Cthulhu Idol is put into a graveyard from anywhere, each player
returns a creature card from their graveyard
to the battlefield.