Blightbeetle + Goblin Bombardment + Wrong Turn

Blightbeetle

Goblin Bombardment

Wrong Turn

How it works

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

This clever loop relies on *Wrong Turn* to permanently hand your opponent a *Blightbeetle*, whose static ability strictly forbids their creatures from receiving +1/+1 counters. With that restriction locked in, you can feed any creature with undying into *Goblin Bombardment* to deal damage; normally, undying would return the creature with a counter that shuts the loop down, but the *Blightbeetle* neatly nullifies that drawback. Because the creature returns without its counter, you can endlessly sacrifice and recur it for infinite damage, death triggers, and sacrifice triggers.