Xavier Sal, Infested Captain + Intruder Alarm + Avenger of Zendikar + Staff of Titania

Xavier Sal, Infested Captain

Intruder Alarm

Avenger of Zendikar

Staff of Titania

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 Avenger of Zendikar trigger.
3. Resolve the Avenger of Zendikar trigger, putting a counter on a creature you control.
4. Resolve the Intruder Alarm trigger, untapping all creatures.
5. Repeat.

This wondrous loop hinges on Xavier Sal, Infested Captain using a counter on a permanent to populate a Forest Dryad token, an act fueled by Staff of Titania's token creation or similar setup. Every time that new Dryad enters the battlefield, Intruder Alarm triggers to untap all your creatures—including Xavier Sal, Infested Captain—so you can immediately tap him again, while Avenger of Zendikar's landfall ability (or token generation) feeds the engine with fresh counters and Plant tokens. By continuously stripping a counter to populate more tokens, you untap your entire board on demand, turning every iteration into an unstoppable cascade of endless creatures, landfall triggers, and +1/+1 counters.