Evereth by sacrificing the persist or undying creature.
When the creature dies, its persist or undying ability triggers if it doesn't have a -1/-1 counter or +1/+1 counter on it respectively, and
Luminous Broodmoth triggers if the creature didn't have flying.
Resolve the persist or undying trigger, if applicable, returning the creature from your graveyard to the battlefield with either a -1/-1 counter or a +1/+1 counter on it.
Resolve the
Luminous Broodmoth trigger, if applicable, returning the creature from your graveyard to the battlefield with a flying counter on it if the creature is still in your graveyard.
Resolve the
Evereth ability.
Repeat.
Notes
You must choose a persist or undying creature that does not have flying - otherwise the
Luminous Broodmoth triggers do not occur.
If you have a way to kill
Evereth and ({1} magic symbol) ({BR} magic symbol) available, you can do so after putting a significant amount of +1/+1 counters on it to deal damage to each opponent using its second ability.
Results
Infinite +1/+1 counters on a creature.
Infinite creature ETB.
Infinite creature LTB.
Infinite creature sacrifice triggers.
Infinite death triggers.
Infinite damage.
Metadata
In 175 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Spicy (Bracket 3-4+).