Sin, Unending Cataclysm + Thornbite Staff + Ashnod's Altar + Arbor Adherent

Sin, Unending Cataclysm

Thornbite Staff

Ashnod's Altar

Arbor Adherent

How it works

1. Cast Sin either from your hand or command zone by paying 5 plus commander tax if applicable.
2. As Sin enters, remove all counters from all artifacts, enchantments and creatures you control, putting twice that many +1/+1 counters on Sin.
3. Activate Arbor Adherent by tapping it, adding an amount of or equal to Sin's toughness.
4. Activate Ashnod's Altar by sacrificing Sin, adding CC.
5. Choose to return Sin to the command zone from your graveyard.
6. When Sin dies, it and Arbor Adherent trigger.
7. Resolve the Sin trigger, putting its counters on Arbor Adherent.
8. Resolve the Arbor Adherent trigger, untapping it.
9. Repeat.

This ingenious loop uses Sin, Unending Cataclysm as both the engine and the payload, converting a massive influx of counters into an unstoppable cycle of sacrifices and returns. By leveraging Arbor Adherent's scaling mana production fueled by Sin's burgeoning toughness, you generate more than enough resources to recast your commander, while Ashnod's Altar converts each sacrifice into colorless energy. The secret to keeping the engine running smoothly lies in Thornbite Staff, whose passive ability automatically untaps Arbor Adherent whenever a creature dies, allowing you to chain your triggers endlessly.