Cavern Harpy + Dazzling Theater // Prop Room + Intruder Alarm

WUB identity

Commander legal

The 3 combo pieces

What must be in place

You control enough creatures such that you can cast Cavern Harpy between mana produced by those creatures and its convoke ability.

How to execute it

  1. Cast Cavern Harpy by tapping a number of creatures and paying {0}.
  2. When Cavern Harpy enters the battlefield, it and Intruder Alarm trigger.
  3. Resolve the Cavern Harpy trigger, returning it from the battlefield to your hand.
  4. Resolve the Intruder Alarm trigger, untapping all creatures.
  5. Repeat.

What the combo produces