Blightbeetle + Goblin Bombardment + Bazaar Trader

Blightbeetle

Goblin Bombardment

Bazaar Trader

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.

By using Bazaar Trader to hand your opponent a Blightbeetle, you weaponize its static ability—which forbids opponents from placing +1/+1 counters on their creatures—to fundamentally break your own undying creatures. Once Blightbeetle is firmly on the opposing side of the battlefield, every time you sacrifice that undying creature to Goblin Bombardment, its death trigger attempts to return it with a counter that the Beetle instantly nullifies. This allows the creature to return completely clean and ready to be sacrificed over and over again, looping indefinitely to blast the table with infinite damage.