Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Blasting Station + Gleeful Arsonist

Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight

Blasting Station

Gleeful Arsonist

How it works

1. Activate Blasting Station by tapping it and sacrificing Gleeful Arsonist
2. When Gleeful Arsonist dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
3. When Gleeful Arsonist enters, Blasting Station triggers, untapping Blasting Station.
4. Activate Blasting Station by tapping it and sacrificing Gleeful Arsonist
5. When Gleeful Arsonist dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
6. When Gleeful Arsonist enters, Blasting Station triggers, untapping Blasting Station.
7. Resolve the Blasting Station abilities from step 1 and 4.
8. Repeat.

This clever loop uses Isilu, Carrier of Twilight's static ability to grant persist to your nontoken creatures, setting up an alternating counter cycle alongside Gleeful Arsonist's native undying ability. You sacrifice the Arsonist to Blasting Station, which triggers both its own untap ability upon the creature's reentry and the back-and-forth counter placement that lets the Arsonist endlessly cheat death. Meanwhile, Eirdu, Carrier of Dawn sits on the reverse side waiting to help you cast creature spells with convoke, though the heart of this particular engine relies on Isilu keeping the sacrifice loop endlessly churning.