All 27 Combos with Geralf's Messenger

Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Viscera Seer + Geralf's Messenger

Other: Infinite ETB, Infinite LTB, Infinite death triggers, Infinite lifeloss, Infinite sacrifice triggers, Infinite scry 1

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