Okay, he wasn't crippled as in he couldn't walk. It's figurative to show that his mana pool or core was damaged and as an effect, he didn't have a bright future as a mage.
If you all stick with this story, and continue to support it, trust me, you won't regret it because, the best is yet to come! So just add to your libraries, read it, and make sure to vote for it.
Amazing storyline, amazing story progression, amazing release speed. This story is one I'm really dedicated to. I know this deserves to be part of the top novels on this platform for sure. You all should support this story and it to your collections and libraries.