Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Grim Poppet + Krark-Clan Grunt

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

Grim Poppet

Krark-Clan Grunt

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 Krark-Clan Grunt by 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. Resolve the Krark-Clan Grunt ability.
6. Repeat.
7. Resolve all Grim Poppet abilities, putting infinite -1/-1 counters on any number of creatures.

This loop relies on Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight to grant your creatures persist on its back side, turning the graveyard into a revolving door for your board state. By using Grim Poppet's activated ability to strip away its own counters, you prepare it to be sacrificed to Krark-Clan Grunt. Once Grim Poppet hits the graveyard, persist brings it right back with a fresh -1/-1 counter, which can then be immediately shifted onto an opponent's creature or back onto Grim Poppet itself to repeat the process indefinitely.