Sin, Unending Cataclysm + Verdant Succession + Hammerhead, Maggia Boss

Sin, Unending Cataclysm

Verdant Succession

Hammerhead, Maggia Boss

How it works

1. Activate Hammerhead by sacrificing Sin.
2. When Sin dies, it and Verdant Succession trigger.
3. Resolve the Sin trigger, moving any counters from it onto another creature you control, and then shuffling Sin into your library.
4. Resolve the Verdant Succession trigger, searching your library for Sin and putting it onto the battlefield.
5. Resolve the Hammerhead ability.
6. Repeat.