Global Magic: I Learned It Wrong and Can Only Cast Forbidden Spells

[Face-slapping + class advancement for all + System + one female lead + invincible protagonist] Jiang Lin was an ordinary student at a magic academy. But after he obtained a System by chance, his magic went off the rails. Other people's fire magic is a little fireball spell that goes "pew!" Jiang Lin's fire magic is "Descend, God of Fire!" Other people's ice magic can only summon a sheet of ice for monsters to slip on. Jiang Lin's ice magic freezes thousands of miles and seals an entire mountain in ice. When others take an exam, the examiner says, "Hmm... not quite there yet... Keep working at it." When Jiang Lin takes an exam, the examiner says, "Hmm... have you no shame? You're already this powerful and you still work this hard? Are you trying to make life impossible for ordinary people?" Just as the examiner says, even though he's already this powerful, he still works just as hard. His motivation is to uncover the truth behind Blue Star's conversion into a data-driven world.