Xavier Sal, Infested Captain + Experiment Kraj + Cinderhaze Wretch + North Pole Patrol

Xavier Sal, Infested Captain

Experiment Kraj

Cinderhaze Wretch

North Pole Patrol

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 North Pole Patrol's ability by tapping it, untapping Xavier Sal.
4. Repeat.

This clever loop turns Experiment Kraj into a self-sustaining engine by borrowing activated abilities from the rest of the board. Cinderhaze Wretch provides the untap mechanism by placing a -1/-1 counter on the Kraj, which Xavier Sal, Infested Captain can then pluck right back off to trigger a populate effect. Meanwhile, North Pole Patrol keeps the sequence flowing by untapping Xavier Sal so he can keep harvesting those counters.