PREVIEW

... e didn't finish comprehending all his spells.

Actually, he didn't gain complete mastery in most of his spells. The only spell he gained complete mastery of is the Dust Cleaning spell used to clean surfaces of dust.

That spell was too easy to cast and to learn. He completed mastery of it in less than 12 hours. As for the other spells, he rotated all of them and ensured that he had practiced them to a certain level so that he wouldn't fail to cast them when he needed them.

...

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