Saren traveled through a fantasy world and became an apprentice to a dark wizard. However, his cheat code only rewards saving lives. From the [Secondary Active Potion], which increases magical affinity and accelerates meditation, to the now-extinct limit-breaking potion [Mad Whisper]; from the [Dragon Devourer] talent, which devours dragon flesh and blood, infinitely strengthening the body, to the [Dragon Overlord] talent, which controls a dragon's life and death with a single word. Dragon God? Just devour it! There are also legendary magical artifacts from [Ancient Secret Treasures] to [Forbidden Myths]... He was surprised to discover other magical uses for his cheat code. For example, if a red light appeared from a companion's heart, Saren would frown and retreat behind the others. Or, if he pretended to spare an enemy who should have died at his hands, he could easily get a free reward! "Have you heard? The Shadow School has a [Merciful...

Because of the fight for the magic treasure, the time traveler, the demon cultivator Logan, was beaten to death, but he was reborn in the wizard world with the magic treasure "Origin Pearl", and became a humble horse slave.

The wizard world has weak spiritual energy, but fortunately Logan has the origin magic pearl.

Magic Pearl: Only by sacrificing the origin of living things can you exchange for the inheritance of the previous life's magic sect- weak spiritual energy?

Then use the evil spirit as nourishment! Practice the art of attracting evil spirits and nourish my demon body.

The means of protecting the way require spiritual energy? Then refine the ghouls to protect me!

The undead wizard in front, don't leave, enter my Ten Thousand Souls Banner for a chat!

Watch Logan use the materials and rules of the wizard world as firewood to ignite the fire of magic:

corpse refining + undead = soul-binding battle puppet

magic array + barrier science = soul-devouring magic net

poison pill + alchemy = rule poison

PS: male protagonist setting: decisive and forbearing, not forcing virginity, no female protagonist, use and kill