Warren Soultrader | Mm'menon, Uthros Exile | Sephiroth, Fabled SOLDIER // Sephiroth, One-Winged Angel

(and one other card)

Persist Creature

All permanents on the battlefield (Persist Creature without a -1/-1 counter on it).

Activate
Warren Soultrader by paying 1 life and sacrificing the Persist Creature.
When the Persist Creature dies, its persist ability and
Sephiroth, Fabled SOLDIER // Sephiroth, One-Winged Angel trigger.
Resolve the persist trigger, returning the Persist Creature from your graveyard to the battlefield with a -1/-1 counter on it.
Resolve the
Sephiroth, Fabled SOLDIER // Sephiroth, One-Winged Angel trigger, causing target opponent to lose 1 life and you to gain 1 life.
Resolve the
Warren Soultrader ability, creating a Treasure token.
When the Treasure enters,
Mm'menon triggers, putting a +1/+1 counter on the Persist Creature.
Repeat.

Whether
Sephiroth, Fabled SOLDIER or
Sephiroth, One-Winged Angel is on the battlefield, the combo will function, either by using
Sephiroth, Fabled SOLDIER's ability or the ability from
Sephiroth, One-Winged Angel's emblem.