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Since Lux didn't want to learn too many spells as it would be detrimental for him to have to choose which one to use, especially in a high level battle, he settled for a dozen or so; each and every single one of them was helpful in its own way, and he couldn't help but want to learn them on the spot.
'Unfortunately, this will have to wait until I finish the Legacy Trial and get back to the Divine Dragon World. It's simply too much information for me to focus on right now and try to master.'
Not willing to waste too much time since it's not an action that could be completed in hours, Lux decided to simply take the spells and learn them later when he could.
The temptation was high though, as there were two spells that piqued his interest a lot since they were related to the Soul. But even those two had to wait until he was free.