Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Highspire Artisan + Grimgrin, Corpse-Born

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

Highspire Artisan

Grimgrin, Corpse-Born

How it works

1. Activate Grimgrin by sacrificing Highspire Artisan.
2. When Highspire Artisan dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When Highspire Artisan enters, its fabricate ability triggers, putting a +1/+1 counter on it.
4. Resolve the Grimgrin ability.
5. Repeat.