Daydreaming in Class, My Mana Derivation Shocks Everyone

Lin Fan, the greatest magister of the Age of Declining Magic, died in battle on the front lines against the evil demons.

But when he opened his eyes again, he discovered that he had transmigrated to the golden age of mages!

Abundant magical energy, an untouched world not yet invaded by evil demons: everything was wonderful!

Just as he was getting excited, the teacher at the podium called on him for spacing out:

"Lin Fan, come up and write out the basic derivation of the magical energy formula."

"Sure."

Lin Fan came to his senses and walked up to the podium.

Twenty minutes later, as the students looked on in bewilderment, the teacher stared at the whiteboard, now filled from top to bottom, in utter shock:

"How is this derivation even more advanced than the one in the textbook?!"

Lin Fan: "Oh no, I accidentally wrote down the derivation method from the future..."

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.