Adarkar Valkyrie + Intruder Alarm + Wall of Stolen Identity

Adarkar Valkyrie

Intruder Alarm

Wall of Stolen Identity

How it works

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

This brilliant loop relies on the legend rule as a built-in sacrifice outlet, bouncing a legendary creature and Wall of Stolen Identity back and forth through your graveyard. Every time one of them enters the battlefield, Intruder Alarm triggers to untap all creatures, ensuring Adarkar Valkyrie is always ready to tap again and target whichever piece just hit the graveyard. Because Wall of Stolen Identity continuously resets as a fresh copy of your legendary creature, this dance creates an endless cycle of enters-the-battlefield and death triggers to fuel whatever payoff you desire.