Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Thermopod + Highspire Artisan

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

Thermopod

Highspire Artisan

How it works

1. Activate Thermopod 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. Repeat.