Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Grim Poppet + Grinding Station

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

Grim Poppet

Grinding Station

How it works

1. If Grim Poppet has any -1/-1 counters on it, activate it by removing a -1/-1 counter from it.
2. Repeat step 1 as necessary until Grim Poppet has no -1/-1 counters on it.
3. Activate Grinding Station by tapping it and sacrificing Grim Poppet.
4. When Grim Poppet dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
5. When Grim Poppet enters, Grinding Station triggers, untapping Grinding Station.
6. Resolve the Grinding Station ability from step 3.
7. Repeat.
8. Resolve all Grim Poppet abilities, putting infinite -1/-1 counters on any number of creatures.

This loop relies on the transforming side of Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight to grant persistent recursion to your board, giving Grim Poppet the persist ability it needs to return to the battlefield every time it dies. Once Grim Poppet strips away its own -1/-1 counters to weaken opposing threats, you feed it to Grinding Station, milling your opponents out as the resulting death and entry triggers endlessly loop the Poppet back to life with a fresh -1/-1 counter. Because Grinding Station untaps every time Grim Poppet re-enters, the sacrifice loop is self-sustaining, letting you systematically mill your entire library while wiping out any creature that dares enter the battlefield.