Adarkar Valkyrie + Intruder Alarm + Yahenni, Undying Partisan

Adarkar Valkyrie

Intruder Alarm

Yahenni, Undying Partisan

How it works

1. Activate Adarkar Valkyrie by tapping it, targeting another nontoken creature you control.
2. Activate Yahenni by sacrificing the creature targeted in step 1.
3. When the creature dies, Adarkar Valkyrie triggers, returning the sacrificed creature from your graveyard to the battlefield.
4. When the creature enters the battlefield, Intruder Alarm triggers, untapping all creatures.
5. Resolve the Yahenni ability.
6. Repeat.

This clever loop transforms Adarkar Valkyrie into a tireless resurrection engine by utilizing Yahenni, Undying Partisan as the designated executioner to instantly cash in the targeted creature. Every time the sacrificed creature is yanked back from the graveyard, Intruder Alarm seizes the moment of its arrival to untap all creatures—crucially granting Adarkar Valkyrie a fresh untap so her tap ability can be fired off all over again. Yahenni, Undying Partisan grows larger with each iteration while also holding an instant-speed protection card in hand by sacrificing other creatures for indestructible if needed.