Adarkar Valkyrie + Intruder Alarm + Vizier of Many Faces

Adarkar Valkyrie

Intruder Alarm

Vizier of Many Faces

How it works

1. Activate Adarkar Valkyrie by tapping it, targeting any legendary creature you control.
2. Cast Vizier of Many Faces by paying 2, 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 Vizier of Many Faces.
7. Resolve the Adarkar Valkyrie trigger from step 4, returning the legendary creature to the battlefield from your graveyard.
8. Put Vizier of Many Faces 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 Vizier of Many Faces to the battlefield from your graveyard as a copy of the legendary creature.
13. Repeat from step 3.

This dazzling loop relies on Intruder Alarm to turn every single entry into an untap catalyst, keeping Adarkar Valkyrie constantly refreshed and ready to tap again. By bringing back Vizier of Many Faces—which conveniently enters the battlefield as a copy of whatever legend you need—you can continuously sacrifice copies to the legend rule while Adarkar Valkyrie catches them on the rebound.