Angelheart Vial

As an additional cost to cast this spell, sacrifice X lands. Create two X/X red Elemental creature tokens.

(T: Add G.)

Flying When this creature enters, gain control of target creature an opponent controls until end of turn. Untap that creature. It gains haste until end of turn.

Annihilator 1 (Whenever this creature attacks, defending player sacrifices a permanent of their choice.) 4: Create two 0/1 colorless Eldrazi Spawn creature tokens. They have "Sacrifice this token: Add C." 20: Cast any number of Eldrazi spells from among cards you own outside the game without paying their mana costs.

You may sacrifice four Eldrazi Spawn rather than pay this spell's mana cost. Annihilator 1 (Whenever this creature attacks, defending player sacrifices a permanent of their choice.)