Blightbeetle + Blasting Station + Fateful Handoff

Blightbeetle

Blasting Station

Fateful Handoff

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.

*(Note: The provided step-by-step instructions reference an "undying creature," which serves as the loop's sacrificial engine alongside Blasting Station.)* This clever loop relies on Blightbeetle's passive static ability to entirely shut down the "+1/+1 counter" drawback of an undying creature, allowing it to endlessly resurrect itself without ever growing too large to trigger Blasting Station's untap ability. Since you need to hand Blightbeetle over to your opponent for its counter-stopping restriction to target their side of the board (or to fulfill the requirements of the combo's setup), Fateful Handoff provides the perfect means to draw cards equal to a permanent's mana value while cleanly donating Blightbeetle away. Once the board is properly configured, Blasting Station repeatedly sacrifices and recycles your undying creature to deal infinite damage to any target, fueled by the endless cycle of entering and leaving the battlefield.