Path of Annihilation (165) [Modern Horizons 3]

Devoid (This card has no color.) When this enchantment enters, create two 0/1 colorless Eldrazi Spawn creature tokens with "Sacrifice this token: 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.