Aerie Ouphes and Rhythm of the Wild on the battlefield.
Aerie Ouphes does not have a -1/-1 counter on it.
There is a creature with flying on the battlefield.
Steps
Activate Aerie Ouphes by sacrificing it, targeting any creature with flying.
When Aerie Ouphes dies, its persist ability triggers, returning it from your graveyard to the battlefield with no -1/-1 counter on it due to Aerie Ouphes' riot ability.
Holding priority, repeat from step 1.
Resolve all Aerie Ouphes abilities, dealing infinite damage to the targeted creature(s).