Blightbeetle + Viscera Seer + Stiltzkin, Moogle Merchant

Blightbeetle

Viscera Seer

Stiltzkin, Moogle Merchant

How it works

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

This clever loop exploits the friction between your own undying creatures and Blightbeetle's passive static ability, which completely shuts down opponents from ever receiving +1/+1 counters. By handing Blightbeetle over to your opponent using Stiltzkin, Moogle Merchant's targeted donation effect, your graveyard-bound threats are guaranteed to return completely unburdened by counters every single time. Once the beetle is safely on their side of the board, you can feed those perpetually recurring creatures directly into Viscera Seer to churn through your entire library while generating an endless stream of sacrifice, death, and entry triggers.