Ygra, Eater of All + Cauldron Familiar + Umbral Collar Zealot + Tormod, the Desecrator

Ygra, Eater of All

Cauldron Familiar

Umbral Collar Zealot

Tormod, the Desecrator

How it works

1. Activate Cauldron Familiar by sacrificing a Food.
2. Ygra triggers, putting two +1/+1 counters on it.
3. Resolve the Cauldron Familiar ability, returning it from your graveyard to the battlefield.
4. Cauldron Familiar and Tormod trigger.
5. Resolve the Tormod trigger, creating a creature token.
6. Resolve the Cauldron Familiar trigger, causing each opponent to lose 1 life and you to gain 1 life.
7. Activate Umbral Collar Zealot by sacrificing Cauldron Familiar.
8. When Cauldron Familiar dies, Ygra triggers, putting two +1/+1 counters on it.
9. Resolve the Umbral Collar Zealot ability.
10. Repeat.

This delightfully morbid loop transforms your entire battlefield into a recycling plant, anchored by Ygra, Eater of All turning every creature into a Food artifact in addition to its other types. You use Cauldron Familiar's ability to sacrifice a Food—which can be a newly minted cat or any other artifact creature—to return the Familiar from your graveyard to the battlefield, triggering its life drain. Because Umbral Collar Zealot is right there ready to sacrifice the cat once it returns, you can loop the Familiar endlessly while utilizing the Zealot's surveil ability to dig through your deck. Meanwhile, Tormod, the Desecrator watches cards leave your graveyard to constantly churn out tapped 2/2 black Zombie creature tokens, which Ygra then immediately conscripts as fresh Food to feed the engine all over again while growing to astronomical proportions with +1/+1 counters.