Sin, Unending Cataclysm + Thornbite Staff + Altar of Dementia + Heronblade Elite

Sin, Unending Cataclysm

Thornbite Staff

Altar of Dementia

Heronblade Elite

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 Altar of Dementia by sacrificing Sin.
4. Choose to return Sin to the command zone from your graveyard.
5. When Sin dies, it and Heronblade Elite trigger.
6. Resolve the Sin trigger, putting its counters on Heronblade Elite.
7. Resolve the Heronblade Elite trigger, untapping it.
8. Resolve the Altar of Dementia ability.
9. Activate Heronblade Elite by tapping it, adding an amount of or equal to its power.
10. Repeat.