Sin, Unending Cataclysm, Thornbite Staff, Altar of Dementia, and Arbor Adherent

Prerequisites

• Sin, Unending Cataclysm in hand or in the command zone
• Thornbite Staff on the battlefield
• Altar of Dementia on the battlefield
• Arbor Adherent on the battlefield
• plus commander tax if applicable available

Steps

1. Cast Sin either from your hand or command zone by paying 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 Altar of Dementia by sacrificing Sin
5. Choose to return Sin to the command zone from your graveyard
6. When Sin dies, it and Arbor Adherent trigger
7. Resolve the Sin trigger, putting its counters on Arbor Adherent
8. Resolve the Arbor Adherent trigger, untapping it
9. Resolve the Altar of Dementia ability
10. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite colored mana
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite mill
• Infinite self-mill
• Infinite storm count
• Infinite commander casts
• Infinite +1/+1 counters on a creature