Altar of Dementia + Colfenor, the Last Yew + Gutter Grime

WBG identity

Commander legal

The 3 combo pieces

How to execute it

  1. Cast the creature card in your hand by paying {0}.
  2. Either that creature dies as a state-based action due to having zero toughness, or activate Altar of Dementia by sacrificing that creature.
  3. Gutter Grime triggers, putting a slime counter on it and creating a X/X Ooze creature token.
  4. Activate Altar of Dementia by sacrificing the Ooze.
  5. When the Ooze dies, Colfenor triggers, returning the creature card from your graveyard to your hand.
  6. If the Altar of Dementia abilities, milling target player a number of cards equal to the sacrificed creature's power each time.
  7. Repeat.

What the combo produces