Blightbeetle + Blasting Station + Blim, Comedic Genius

Blightbeetle

Blasting Station

Blim, Comedic Genius

How it works

1. Donate Blightbeetle to an opponent
2. Activate Blasting Station by tapping it and 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. When the undying creature enters, Blasting Station triggers, untapping Blasting Station.
5. Resolve the Blasting Station ability from step 2.
6. Repeat from step 2.

This clever loop sets up an infinite engine by leveraging Blightbeetle's passive ability to strip away the primary drawback of creatures with undying, ensuring they return to the battlefield without ever accumulating +1/+1 counters. With that restriction locked in, Blasting Station provides both the sacrifice outlet and the targeted damage needed to close out a game, while happily untapping itself every time a creature re-enters the fray. Though not explicitly used in the mechanical loop, Blim, Comedic Genius shares space in these colors and can even act as a humorous vehicle to donate the Blightbeetle across the table to your opponent in the first place, ensuring the beetle's counter-denying aura is properly positioned to keep the loop going indefinitely.