Altar of Dementia + Mikaeus, the Unhallowed + Plague Belcher

B identity

Commander legal

The 3 combo pieces

• Altar of Dementia
• Mikaeus, the Unhallowed
• Plague Belcher

How to execute it

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

What the combo produces

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