Deathrender + Gravedigger + Eternal Witness + Altar of Dementia

Prerequisites

• Deathrender attached to Eternal Witness.

Steps

1. 1Activate Altar of Dementia by sacrificing Eternal Witness.
2. 2Eternal Witness dies, triggering Deathrender, putting Gravedigger from your hand onto the battlefield and attaching Deathrender to it.
3. 3Gravedigger enters the battlefield, returning Eternal Witness from your graveyard to your hand.
4. 4Resolve the Altar of Dementia ability from step 1, causing target player to mill cards equal to Eternal Witness' power.
5. 5Activate Altar of Dementia by sacrificing Gravedigger.
6. 6Gravedigger dies, triggering Deathrender, putting Eternal Witness from your hand onto the battlefield and attaching Deathrender to it.
7. 7Eternal Witness enters the battlefield, returning Gravedigger from your graveyard to your hand.
8. 8Resolve the Altar of Dementia ability from step 5, causing target player to mill cards equal to Gravedigger's power.
9. 9Repeat.

Effects

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