Altar of Dementia + Grazing Kelpie + Thran Vigil

BGU identity

Commander legal

The 3 combo pieces

• Altar of Dementia
• Grazing Kelpie
• Thran Vigil

How to execute it

1. Activate Altar of Dementia by sacrificing Grazing Kelpie.
2. When Grazing Kelpie 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 Grazing Kelpie.
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