So how do you use thr Chroma Catalyst? I don't see any options at the flags to upgrade weapons.
Got to progress the story to upgrade weapons.The Lumina points you can use when a character learns a lumina skill or whatever its called, you get a message after the battle, you can equip a learned skill without having to equip the chroma as long as you have the necessary lumina points so if a skill cost 5 and you have 7 points you can equip that one + one that cost 2 if you have any.