Strongest Sage with the Weakest Crest 32

Gradis, a supreme demon from an era even before Matty’s past life as Gaius, has been revived and is mustering a massive army of monsters! With no past intel to rely on, Matty’s party must go into the fight blind. To make matters worse, the demon’s armor converts MP into a defensive shield, making this already powerful foe all but invulnerable! What strategy will the Strongest Sage cook up to break the unbreakable?