Xavier Sal, Infested Captain + Intruder Alarm + Staff of Titania + Undergrowth Champion

Xavier Sal, Infested Captain

Intruder Alarm

Staff of Titania

Undergrowth Champion

How it works

1. Activate Xavier Sal by tapping it and removing a counter from a permanent you control, creating a token copy of the Forest Dryad token.
2. When the Forest Dryad enters the battlefield, Intruder Alarm and Undergrowth Champion trigger.
3. Resolve the Undergrowth Champion trigger, putting a counter on a creature you control.
4. Resolve the Intruder Alarm trigger, untapping all creatures.
5. Repeat.

This intricate loop centers around Xavier Sal, Infested Captain using his populate ability by paying a small cost—removing a counter from a permanent you control—which is easily sustained by Undergrowth Champion growing via landfall and preventing its own damage. Every time Xavier populates a Forest Dryad token created by Staff of Titania, that new token's arrival triggers Intruder Alarm to untap all creatures, including Xavier Sal himself. This constant refreshing allows you to repeat the process indefinitely, turning a single counter-removal cycle into an endless cascade of creature tokens, landfall triggers, and untapped potential.