Blightbeetle + Wrong Turn + Yahenni, Undying Partisan

Blightbeetle

Wrong Turn

Yahenni, Undying Partisan

How it works

1. Donate Blightbeetle to an opponent
2. Activate Yahenni 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 Yahenni ability.
5. Repeat from step 2.

This clever loop uses Wrong Turn to gift an opponent a Blightbeetle, turning its passive prevention of +1/+1 counters against them. With that restriction locked in, you can feed an undying creature to Yahenni, Undying Partisan's sacrifice ability over and over again. Because Blightbeetle stops the undying creature from returning with a counter, the creature can return to the battlefield endlessly to generate infinite sacrifice, death, and entry triggers.