A scroll inscribed with strange symbols that seal away the puissance of a moogle. Chanting the enigmatic script summons its alter ego to the bearer's side.
Finally after making them store all our gear, leaving them abandoned in a house, and killing some of them, we finally get to take them with us on an adventure!
Just like Sakura, xe's just a walking indi-spell that boost skill gain.
Only instead of regen and combat skills (though I would have sworn Sakura was all skills), xe is a magic skill gain boost (assumedly similarly as redonk potent as Sakura) and indi-refresh.