Path of Annihilation

Devoid (This card has no color.)
When Path of Annihilation enters, create two
0/1 colorless Eldrazi Spawn creature tokens
with "Sacrifice this creature: Add {c}."
Eldrazi you control have "{t}: Add one mana
of any color."
Whenever you cast a creature spell with mana value 7 or greater, you gain 4 life.