Adarkar Valkyrie + Intruder Alarm + Stunt Double

Adarkar Valkyrie

Intruder Alarm

Stunt Double

How it works

1. Activate Adarkar Valkyrie by tapping it, targeting any legendary creature you control.
2. Cast Stunt Double by paying 3, choosing to have it enter the battlefield as a copy of the legendary creature targeted in step 1.
3. Put the legendary creature into your graveyard due to the legend rule.
4. Adarkar Valkyrie and Intruder Alarm trigger.
5. Resolve the Intruder Alarm trigger, untapping all creatures.
6. Holding priority, activate Adarkar Valkyrie by tapping it, targeting Stunt Double.
7. Resolve the Adarkar Valkyrie trigger from step 4, returning the legendary creature to the battlefield from your graveyard.
8. Put Stunt Double into your graveyard due to the legend rule.
9. Adarkar Valkyrie and Intruder Alarm trigger.
10. Resolve the Intruder Alarm trigger, untapping all creatures.
11. Holding priority, activate Adarkar Valkyrie by tapping it, targeting the legendary creature.
12. Resolve the Adarkar Valkyrie trigger from step 9, returning Stunt Double to the battlefield from your graveyard as a copy of the legendary creature.
13. Repeat from step 3.

This clever loop relies on Intruder Alarm to constantly refresh your board whenever a new face arrives, turning the legend rule into an engine rather than a penalty. By using Stunt Double to copy a legendary creature already on the battlefield, the resulting state forces one copy to the graveyard, which triggers Adarkar Valkyrie's delayed ability to return it. Because every creature entering the battlefield—including the one brought back by Adarkar Valkyrie—wakes up the entire board via Intruder Alarm, Adarkar Valkyrie stays perpetually untapped to catch the next casualty.