Altar of Dementia + Necrogen Communion + Shepherd of the Cosmos

WB identity

Commander legal

The 3 combo pieces

• Altar of Dementia
• Necrogen Communion
• Shepherd of the Cosmos

What must be in place

Necrogen Communion attached to Shepherd of the Cosmos.

How to execute it

1. Activate Altar of Dementia by sacrificing Shepherd of the Cosmos.
2. When Shepherd of the Cosmos dies, Necrogen Communion triggers, returning Shepherd of the Cosmos from your graveyard to the battlefield.
3. When Shepherd of the Cosmos enters the battlefield, it triggers, returning Necrogen Communion from your graveyard to the battlefield attached to Shepherd of the Cosmos.
4. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Shepherd of the Cosmos' power.
5. Repeat.

What the combo produces

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