As An Undead Wizard, I Summon SSS-level Undead Disaster - Chapter 3

The dawn era after the end of the half century has gradually rebuilt the order, abandoned civilization, and is full of undivided violence and desire.
The noble and powerful pioneers are in charge of the city, and the evil and mad plagues are in the wilderness.
Pure human beings who cannot mutate are the weakest, dominated by the rulers of the pioneers, and are not as good as animals in the wilderness.
A purely humanized young man with a worldly experience has quietly entered the WTO, holding a three-foot long knife and a long-distance desire to boil in the world of purgatory. From the nameless name to the sorrow of the Supreme Court, the name of the black ride is resounding!

- Description from Uukanshu (translated)

DING![Ist Skill Devour Successful]______“They say a man's skills are honed over a lifetime, but what if he could devour them all in an instant?”Ryuen Takeru, a skilled, retired assassin, decides to pursue a better job that would keep him away from the dark life he once led.However, after a while, that peace was shattered when an unexpected train ride derailed reality itself, throwing him into a world and a life he had always hated.A world teetering on the brink of ruin, destroyed by an apocalypse as a result of the unending war between multiple races.Unfortunately, the post-apocalypse had already begun.Ryuen finds himself captured, exchanged, and made to serve kings of different nations.Yet fate had more in store for him.A devastating twist, capable of destroying or elevating him—the one thing he had overlooked as normal until the moment he was informed.A curse.Possible reincarnation?[Skill Devourer Activated: Plunder, Consume, Adapt, Evolve.]Nevertheless, for everything given, something must be taken—or perhaps sacrificed.

What would you do if you were reborn in the world of Battle Through the Heavens without a distinguished background or an elder in your ring and just a decent talent?Luckily, Xiao Ming has awakened the Life Simulator System![The Life Simulator is on]......[You have experienced an ordinary life.][Elements are being chosen.][Currently available: Green Lotus Core Flame, Flame Mantra, Woeful Poison Body.][Please choose one.]Every seven days, he can choose to extract one of the elements from his life simulation.In this way, Xiao Ming began his ordinary life.

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