Altar of Dementia + Bifur, Melodic Rider + Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight

RWB identity

Commander legal

The 3 combo pieces

• Altar of Dementia
• Bifur, Melodic Rider
• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight

How to execute it

1. Activate Altar of Dementia by sacrificing Bifur.
2. When Bifur dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When Bifur enters, it triggers, putting a +1/+1 counter on it.
4. Resolve the Altar of Dementia ability.
5. Repeat.

What the combo produces

• Infinite +1/+1 counters on most creatures you control
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill