Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Zack Fair + Skittering Precursor

Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight

Zack Fair

Skittering Precursor

How it works

1. Activate Zack by paying 1 and sacrificing it.
2. When Zack dies, its persist ability and Skittering Precursor triggers.
3. Resolve the persist trigger, returning Zack from your graveyard to the battlefield without a -1/-1 counter on it due to its replacement effect.
4. Resolve the Skittering Precursor trigger, creating a 0/1 Eldrazi Spawn creature token.
5. Resolve the Zack ability from step 1.
6. Activate the Eldrazi Spawn by sacrificing it, adding C.
7. Repeat.

This brilliant loop turns Zack Fair into a self-sustaining sacrifice engine by taking advantage of the persist ability granted by Isilu, Carrier of Twilight (the transformed face of Eirdu, Carrier of Dawn). When you activate Zack Fair by paying {1} and sacrificing him, Skittering Precursor steps in to reward the sacrifice by generating an Eldrazi Spawn token, which you can immediately sacrifice to recoup your mana. Meanwhile, Zack's own persist trigger brings him right back to the battlefield with no -1/-1 counters to slow him down, ready to be sacrificed all over again for infinite triggers.