Precons with Sin, Unending Cataclysm

Sin, Unending Cataclysm

Legendary Creature — Leviathan Avatar

Flying, trampleAs Sin enters, remove all counters from any number of artifacts, creatures, and enchantments. Sin enters with X +1/+1 counters on it, where X is twice the number of counters removed this way.When Sin dies, put its counters on target creature you control, then shuffle this card into its owner's library.

5/5