Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Geralf's Messenger + Umbral Collar Zealot

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

Geralf's Messenger

Umbral Collar Zealot

How it works

1. Activate Umbral Collar Zealot by sacrificing Geralf's Messenger
2. When Geralf's Messenger dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
3. When Geralf's Messenger enters, it triggers, causing an opponent to lose 2 life.
4. Activate Umbral Collar Zealot by sacrificing Geralf's Messenger
5. When Geralf's Messenger dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
6. When Geralf's Messenger enters, it triggers, causing an opponent to lose 2 life.
7. Resolve both Umbral Collar Zealot abilities from step 1 and 4.
8. Repeat.