Altar of Dementia + Glen Elendra Archmage + Thran Vigil

UB identity

Commander legal

The 3 combo pieces

• Altar of Dementia
• Glen Elendra Archmage
• Thran Vigil

How to execute it

1. Activate Altar of Dementia by sacrificing Glen Elendra Archmage.
2. When Glen Elendra Archmage dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Thran Vigil triggers, putting a +1/+1 counter on Glen Elendra Archmage.
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