Altar of Dementia + Arashin Sovereign + Colossal Grave-Reaver

WBG identity

Commander legal

The 3 combo pieces

• Altar of Dementia
• Arashin Sovereign
• Colossal Grave-Reaver

How to execute it

1. Activate Altar of Dementia by sacrificing Arashin Sovereign.
2. When Arashin Sovereign dies, it triggers, putting itself from your graveyard onto the top of your library.
3. Resolve the Altar of Dementia ability, causing you to mill cards equal to Arashin Sovereign's power, ultimately milling Arashin Sovereign.
4. Colossal Grave-Reaver's second ability triggers, putting Arashin Sovereign from your graveyard onto the battlefield.
5. Repeat.

What the combo produces

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