Cthulu, The Dreamer

Indestructable
Cthulu is an enchantment as long as it has a devotion to his colors 7 or less
{5} create a 0/1 cultist
Sacrifice 3 creatures: Destroy target non black creature
Sacrifice 5 creatures: Create a 6/6 black and blue horror
Sacrifice 7 creatures: Gain control of target creature