Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Reyhan, Last of the Abzan + Yahenni, Undying Partisan

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

Reyhan, Last of the Abzan

Yahenni, Undying Partisan

How it works

1. Activate Yahenni by sacrificing Reyhan.
2. When Reyhan dies, its persist ability and innate ability trigger.
3. Resolve the persist trigger, returning Reyhan from your graveyard to the battlefield without a -1/-1 counter on it due to its replacement effect.
4. Resolve the innate trigger, putting a number of +1/+1 counters on a creature.
5. Resolve the Yahenni ability.
6. Repeat.