It That Lurks In Every Dream

This creature can't attack or block unless you control an illusion, nightmare, and a horror.
{u} Sacrifice a creature: Create a 2/2 blue illusion creature token with "When this creature becomes targeted of a spell or ability sacrifice it."
{b}{b} Sacrifice an Illusion: Create a 3/3 black Nightmare with "When this creature deals combat damage to a player, that player discards a card.
{g}{g}{g}: Sacrifice a Nightmare: Create a 4/4 Green Horror with "Whenever you sacrifice a creatur