Sin, Unending Cataclysm + Aura of Dominion + Phyrexian Altar + Arbor Adherent

Sin, Unending Cataclysm

Aura of Dominion

Phyrexian 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 Aura of Dominion by paying 1 and tapping Sin, untapping Arbor Adherent.
5. Activate Phyrexian Altar by sacrificing Sin, adding G/U.
6. Choose to return Sin to the command zone from your graveyard.
7. When Sin dies, it triggers, putting its counters on Arbor Adherent.
8. Repeat.