Altar of Dementia + Deathrender + Eternal Witness + Gravedigger

BG identity

Commander legal

The 4 combo pieces

What must be in place

Deathrender attached to Eternal Witness.

How to execute it

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

What the combo produces