Kroxa and Kunoros, and Altar of Dementia

Prerequisites

• Kroxa and Kunoros in hand or in the command zone
• Altar of Dementia on the battlefield
• plus enough mana to pay for commander tax, if applicable available

Steps

1. Cast Kroxa and Kunoros either from your hand or from the command zone by paying and commander tax, if applicable
2. When Kroxa and Kunoros enters the battlefield, it triggers
3. Holding priority, activate Altar of Dementia by sacrificing Kroxa and Kunoros, causing you to mill cards equal to Kroxa and Kunoros' power
4. Resolve the Kroxa and Kunoros trigger, causing you to exile five other cards from your graveyard and return Kroxa and Kunoros from your graveyard to the battlefield
5. Repeat from step 2

Results

• Exile your library
• Infinite self-mill