Demon hunter's Cooking Manual - Chapter 991 - 23 Masks, Knives, Flesh!

This novel is also known as The Indomitable Master of Elixirs

She is the twenty-fourth century’s strongest immortal cultivator, but transferred into a world of magic where demons roamed rampant; a punching bag tyrannized and ostracized by her clan on one side while the scum of a man that is her fiancé humiliated, trampled her on the other side…

Want to ravage her? She laughs as she will soon teach them how to behave themselves!

Magic is amazing? Her Five Lightning’s Bombardment Talisman will turn you into ashes! Medication is very incredible? With one furnace of medicinal pills, useless can also become genius! A vigorous army of a million is very ferocious? With Scattering Beansprout Soldiers, all of you can slowly play!

Smilingly watching as those who court death act vilely without salvation. Those who submit to me prosper, those who oppose me, perish!

Only… For what reason does this Grandmaster whose face is as beautiful as a flower, when facing her, always “secretly casts passionate glances”?

A certain Grandmaster: “After sleeping for so long, now you don’t acknowledge”?

- Description from novelupdates

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.

A loner boy, who’s always loved escaping into his RPG world, suddenly finds himself living as one of his game characters. But instead of becoming his favored fighter, he’s in the body of his second avatar—a support mage! Though he’s used to playing both roles, being the mage in real life is a whole new challenge. Now he must rely on his knowledge and skills to navigate this unfamiliar reality and survive as the game's “support.”