Altar of Dementia + Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Mikaeus, the Unhallowed

WB identity

Commander legal

The 3 combo pieces

• Altar of Dementia
• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight
• Mikaeus, the Unhallowed

How to execute it

1. Activate Altar of Dementia by sacrificing another nontoken non-Human creature
2. When the creature dies, its undying ability triggers, returning the creature from your graveyard to the battlefield with a +1/+1 counter on it.
3. Activate Altar of Dementia by sacrificing the creature with a +1/+1 counter on it.
4. When the creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
5. Resolve the 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