Altar of Dementia + Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Gleeful Arsonist

RWB identity

Commander legal

The 3 combo pieces

• Altar of Dementia
• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight
• Gleeful Arsonist

How to execute it

1. Activate Altar of Dementia by sacrificing Gleeful Arsonist
2. When Gleeful Arsonist dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
3. Activate Altar of Dementia by sacrificing Gleeful Arsonist
4. When Gleeful Arsonist dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
5. Resolve both Altar of Dementia abilities from step 1 and 3.
6. Repeat.

What the combo produces

• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill