Blightbeetle + Carrion Feeder + Blim, Comedic Genius

Blightbeetle

Carrion Feeder

Blim, Comedic Genius

How it works

1. Donate Blightbeetle to an opponent
2. Activate Carrion Feeder by sacrificing the undying creature.
3. When the undying creature dies, its undying ability triggers, returning itself from your graveyard to the battlefield without a +1/+1 counter on it due to Blightbeetle.
4. Resolve the Carrion Feeder ability.
5. Repeat from step 2.

This clever loop hinges on the nasty trick of using Blim, Comedic Genius to donate Blightbeetle across the table to your opponent. Once planted on their side of the board, Blightbeetle's passive ability prevents their creatures from receiving +1/+1 counters, which brilliantly sabotages the self-buffing safety net of any undying creature you feed to Carrion Feeder. Without those counters locking them out of future resurrections, your sacrificed creature keeps endlessly returning from the graveyard, fueling Carrion Feeder with infinite growth while generating a boundless storm of death and sacrifice triggers.