I couldn't miss the chance to practice my drawing!
Years later Torte came to Arbor searching for Lux and opened the chest holding it; in the process, Torte broke the seal that trapped Belphegor and set him free. After the Heroes of Light defeat Belphegor, Queen Arbor gives them the Lux spell.
Lux can be given to any character by having the Lux Tome in their inventory. When the spell is used, it raises everyone's max HP by around 1.5 times their original amount, casts Regen and all the ability and AP regenerate strengthening buffs on the the entire party. The ability normally costs 5 AP to use, but this lowers down to 4 AP when used by a character with the White Mage crown.
Lux is a Special move for staves. To use it, the player must cast healing magic 20 times. It raises the physical and magic attack and defense to all allies by 25% for four turns and all allies will have a Speed increase of 35% for the duration of the user's character theme.
Bravely Second: End Layer
Lux is the level 3 support-type Special Move for staves. It raises all allies' P.Atk, P.Def, M.Atk, and M.Def by 25%. It lasts for 4 turns. For the duration of the music, all allies' speed is raised by 35%. The upper limit for P.Atk/M.Atk and P.Def/M.Def is 150%. Music bonuses will stack with other attribute bonuses.