MTL - My Pet is a Snapping Turtle - Chapter 582 is this ancient

Revere knowledge, pursue truth, control fire, command frost, manipulate lightning, ride storms, enslave the undead...Spreading ancient prophecies and curses, known as the wizard.“Immortal Phoenix Bloodline + Ancient [Eternal Life] Rune...”“After forty million sunsets, I shall finally attain immortality!”

Long ago a great calamity struck the earth, destroying much of it and merging what remained with pieces of other worlds.

With these worlds came Aether, a new form of energy that can allow one to transcend the bounds of normal mortality and human limitations.

In a world where humans absorb the essence of aether beasts to gain power, Aiden Hawke joins the class of humans known as arcanists, people who defeat aether beasts and absorb their essence into cores they forge within themselves, and who infuse themselves with the aether that permeates the world around them to increase the power of their body and mind.

However, unlike most, Aiden will find that he holds a unique gift and that his journey as an arcanist will not be so simple.

Yang Lujia, a sought-after, handsome, sports-driven, and seemingly perfect man with an outstanding family background was killed in a plane bombing orchestrated by his so-called pals. Before he even knew it, his soul traveled through space, and his supposed-to-be ending unexpectedly took turns.

Unknowingly, he set foot into a world made up of five realms where strength matters most. Then, one day, following a mission, he started accepting disciples.

[Ding! The system has discovered an S-Class Genius! System’s Fifth Ability Unlocked: Disciple Acknowledgment!]

[New Mission: Recruit and acknowledge the Holy Flood Empire's S-Class Genius. The reward will be issued upon acknowledgment from both parties.]

One day, I woke up only find out that I’d become a Demon Lord, an individual responsible for protecting a dungeon. The world I’d been spirited away to was one filled with violence. Gigantic monsters wandered through it and competed with each other each and every day for the right to survive. I had no choice but to strengthen my dungeon’s defenses in hopes of living another day—or at least that was what I’d thought. For some odd reason, I instead ended up spending my days in relaxation and bliss.