If you beat the game, you can explore a bonus dungeon called "Vortex Corridor". In this corridor you'll find the best weapons, armors, vellums and items. This is also a good way to level up your party to fight against Zenothlee. I couldn't find a complete and uncutted walkthrough of the entire Vortex Corridor, so I decided to do it.
https://d.tube/#!/v/ozelot47/z24q58q8cns
