Sin, Unending Cataclysm + Verdant Succession + Spawning Pit
Sin, Unending Cataclysm
Verdant Succession
Spawning Pit
Infinite +1/+1 counters on creatures you controlInfinite charge counters on a permanentInfinite creature ETBInfinite creature LTBInfinite creature sacrifice triggersInfinite death triggers
How it works
Activate Spawning Pit by sacrificing Sin.
When Sin dies, it and Verdant Succession trigger.
Resolve the Sin trigger, moving any counters from it onto another creature you control, and then shuffling Sin into your library.
Resolve the Verdant Succession trigger, searching your library for Sin and putting it onto the battlefield.