Xavier Sal, Infested Captain + Intruder Alarm + Awaken the Woods + Territorial Scythecat

Xavier Sal, Infested Captain

Intruder Alarm

Awaken the Woods

Territorial Scythecat

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

This intricate loop transforms a modest army into an unstoppable force by exploiting the constant untap trigger of Intruder Alarm every time a new creature enters the battlefield. You begin by using Awaken the Woods to establish initial Forest Dryad tokens alongside Territorial Scythecat, which happily collects +1/+1 counters via landfall each time a land enters. Xavier Sal, Infested Captain sits at the heart of the engine, using its tap ability to remove one of those accumulated counters—or any other counter on your board—to populate and churn out yet another Forest Dryad. Because that new token enters the battlefield, Intruder Alarm triggers to untap Xavier Sal along with all your other creatures, allowing you to repeat the process indefinitely for boundless creature tokens, landfall triggers, and untaps.