Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Umbral Collar Zealot + Hancock, Ghoulish Mayor

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

Umbral Collar Zealot

Hancock, Ghoulish Mayor

How it works

1. Activate Umbral Collar Zealot by sacrificing Hancock
2. When Hancock dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
3. Resolve the Umbral Collar Zealot ability.
4. Activate Umbral Collar Zealot by sacrificing Hancock
5. When Hancock dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
6. Hancock enters and dies as a state-based action due to having 0 toughness. Its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
7. Resolve the Umbral Collar Zealot ability from step 4.
8. Repeat from step 4.