Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Nearheath Stalker + Yahenni, Undying Partisan

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

Nearheath Stalker

Yahenni, Undying Partisan

How it works

1. Activate Yahenni by sacrificing Nearheath Stalker
2. When Nearheath Stalker dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
3. Resolve the Yahenni ability.
4. Activate Yahenni by sacrificing Nearheath Stalker
5. When Nearheath Stalker dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
6. Nearheath Stalker 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 Yahenni ability from step 4.
8. Repeat from step 4.