Spawnsire of Ulamog + Kaya, Geist Hunter

Spawnsire of Ulamog

Kaya, Geist Hunter

How it works

1. Activate Kaya's second loyalty ability by removing two loyalty counters from it, causing you to double any tokens you create this turn.
2. Activate Spawnsire of Ulamog by paying 4, creating four 0/1 Eldrazi Spawn creature tokens.
3. Activate the Eldrazi Spawns by sacrificing them, adding CCCC.
4. Repeat from step 2.

This mesmerizing loop hinges on Kaya, Geist Hunter's minus ability, which permanently alters the game rules for the turn to double any token generation under your control. With that multiplier active, each activation of Spawnsire of Ulamog's first ability yields four Eldrazi Spawn instead of two, perfectly offsetting the four mana required to activate it. By repeatedly sacrificing those very tokens for colorless mana, you achieve an infinite engine of creature enters-the-battlefield, leaves-the-battlefield, and death triggers, all while fueling an endless storm of sacrifices.