Quote Originally Posted by Exodus-E View Post
Sophia was imprisoned in Azys Lla for millennia (only being released for her final defeat), how did he learn Quasar from her, exactly?

It simply doesn't make any sense...
I don't see any problems about this. I mean, there IS lore about it:

"A new tomestone discovered by Unukalhai contains records of ancient battles with Sophia─specialized data which will enable Azys Lla's miraculous reality augmentation technologies to generate a simulacrum of the Goddess at the height of her power. Have you the strength to overcome this challenge, as the champions of Allag once did? Enter the combat simulation, and test the limits of your might! "

He probably did just the same thing we did: He played the video game and learned the spell there.