Catching the Mastermind Trophy in Romancing SaGa 3 (PS4 & Vita)

This is technically a lengthy side quest, this story-centric mission becomes available once the player has completed the Dream Eater quest, has Herman/Black in party, and has learned details about Jackal's/Maximus' orichalcum earrings. The quest begins at the Divine Order HQ in Pidona and ends at Archlord Tower. The actual fight with Maximus begins as a 1vs1 duel but so long as you survive enough turns, your other party members catch up to you in the tower.