Xavier Sal, Infested Captain + Experiment Kraj + Cinderhaze Wretch + Ioreth of the Healing House

Xavier Sal, Infested Captain

Experiment Kraj

Cinderhaze Wretch

Ioreth of the Healing House

How it works

1. Activate Experiment Kraj using Cinderhaze Wretch's second ability by putting a -1/-1 counter on it, untapping it.
2. Activate Xavier Sal's first ability by tapping it and removing a -1/-1 counter from Experiment Kraj, creating a copy of any creature token you control.
3. Activate Experiment Kraj using Ioreth of the Healing House's ability by tapping it, untapping Xavier Sal.
4. Repeat.

This intricate engine achieves infinite self-sustainability by cleverly turning Cinderhaze Wretch's self-untapping drawback into a renewable resource for Xavier Sal, Infested Captain to consume. Once Experiment Kraj has inherited the activated abilities of Cinderhaze Wretch and Ioreth of the Healing House—likely via a +1/+1 counter—it can repeatedly untap itself by placing a -1/-1 counter on its own body. Xavier Sal then steps in to remove that newly placed -1/-1 counter in order to populate your board, clearing the way for Ioreth of the Healing House (or Experiment Kraj mimicking her) to untap Xavier Sal and restart the loop.