Mesmer Prodigy

Rehearse (At the beginning of your upkeep, put a
verse counter on Mesmer Prodigy.)
Finale - Whenever an enchantment saga you
controlled leaves the battlefield, create a 1/1 blue
Illusion creature token for each verse counter on
Mesmer Prodigy.
Remove three verse counters from Mesmer
Prodigy: Return an enchantment saga from your
graveyard to the battlefield.