Colfenor, the Last Yew + Gutter Grime + Phyrexian Altar

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 Phyrexian Altar by sacrificing that creature, adding one mana of any color.
  3. Gutter Grime triggers, putting a slime counter on it and creating a X/X Ooze creature token.
  4. Activate Phyrexian Altar by sacrificing the Ooze, adding one mana of any color.
  5. When the Ooze dies, Colfenor triggers, returning the creature card from your graveyard to your hand.
  6. Repeat.

What the combo produces