Intruder Alarm + Torpor Orb

Intruder Alarm

Torpor Orb

How it works

1. Intruder Alarm's first ability prevents creatures from untapping during their controller's untap step.
2. Because Torpor Orb prevents abilities from triggering whenever a creature enters the battlefield, Intruder Alarm's second ability does not trigger to untap them.

This curious locking engine shuts down the entire battlefield by turning Intruder Alarm's primary drawback—halting normal untap steps for all creatures—into a permanent state of affairs. Ordinarily, Intruder Alarm would try to break its own lock the moment a single creature entered the battlefield by untapping everything, but Torpor Orb steps in to completely suppress those entering-triggered abilities. With the alarm bells permanently silenced and the natural cycle of untapping broken, your opponents will find their entire armies hopelessly frozen in place.