Altar of Dementia + Colossal Grave-Reaver + Mortuary

BG identity

Commander legal

The 3 combo pieces

What must be in place

You control another nontoken creature whose power is 1 or greater.

How to execute it

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

What the combo produces