I Breathe Euro - Chapter 119 Samantha Ruth.

He defied the heavens once, he returns to do it again.In a past life, he was Xie Wuchen, the heretic god of cultivation. A rebel who shattered divine law, betrayed the celestial order, and vanished in a blaze of infamy.Now, he is Lan—a crippled prince in a world ruled by mana and noble bloodlines. His mana core is broken. His name is a joke. His existence, forgotten.Until the rain falls.And something awakens:[Forbidden Arts Synchronization: Complete][Elapsed Time: 16 years, 10 months, 15 days][Memory Restoration in Progress…]The soul of Heaven’s greatest traitor has returned with a hunger far greater than revenge.And he plans to do more than ascend the magical hierarchy. He will annihilate it.This time, he will forge an empire—not of nobles or spellcasters, but something this new world have never known—Cultivators, trained in arts banned by gods and feared by men.Those who mocked him will kneel.Those who ruled by birthright will burn.And the heavens, once again, will tremble.Magic rules this world.But cultivation will conquer it.

Saying 5000 year-old-dragon has an impressive ring to it, yet that dragon was an extremely harmless, herbivorous being. However, because of his uselessly giant figure and scary appearance, he was mistaken for the Demon King’s executive and provided by the nearby village with a sacrificial maiden.

Fundamentally cowardly and timid dragon tried to send her away, but the extremely enthusiastic sacrifice didn’t want to give up. Inevitably, he lied: “Okay, I just ate a small portion of your soul, so you can go back already”, but the maiden with outrageous assumptions has misunderstood that she became the dragon’s kin.

Then, out of all things, she began to manifest strange power on the basis of her wrong assumptions – in turn, the helpless dragon, by some mistake started a rebellion against the Demon King.

Rebellion or whatnot, he wasn’t even his subordinate in the first place.

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

Lin Qi transmigrates to a world of immortals. In this world, there are sword immortals who can behead a person from a thousand miles away, peerless great demons who burn mountains and boil the seas, and ancient gods and devils who can divine the heavenly secrets.