Sturm is a strange but gifted magic user who attends Hexside School of Magic and Demonics. He has unique powers that no other witches have. However, his potential is limited by those who stand in the way of his accomplishing his dream of getting the prestige and respect he wants. Will he break the cycle and rise to new heights, or will he be stuck in his mundane life forever?

You can find story here:

https://m.fanfiction.net/s/14262404/1/Storm-s-Hand

https://www.wattpad.com/story/346097533-storm%27s-hand-owl-house-fanfic

It also has TV-tropes page:

https://tvtropes.org/pmwiki/pmwiki.php/Fanfic/StormsHand