Cauldron of Souls + Extruder + Gerrard, Weatherlight Hero + Phyrexian Altar

RW identity

Commander legal

The 4 combo pieces

What must be in place

Gerrard has no more than one -1/-1 counter on it.

How to execute it

  1. Activate Cauldron of Souls by tapping it, giving Gerrard persist until end of turn.
  2. Activate Extruder by sacrificing Cauldron of Souls, putting a +1/+1 counter on Gerrard.
  3. Activate Phyrexian Altar by sacrificing Gerrard, adding one mana of any color.
  4. When Gerrard dies, it and its persist ability trigger.
  5. Resolve the Gerrard persist trigger, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  6. Resolve the second Gerrard trigger, failing to exile it as it has left your graveyard, and returning Cauldron of Souls from your graveyard to the battlefield.
  7. Repeat.

What the combo produces