The supporting character's harem is very normal - Chapter 63 Blood contract

Eli was transmigrated to a world of magic and became immortal.

He had endless life and could never die.

“Huh? I’m talentless? Then, I’ll just train for as long as I need, even if it takes 1000 years. That should be enough for me to become strong.”

“The skill is hard to learn? Then, I’ll take a few dozens of years to research it. There’s no way it’s that hard, right?”

“What? I can sacrifice my life force to gain spirit power? That’s a bargain!”

“The enemy is here? Hell, I’ll just hide for 10000 years. Let’s see if he can outlive me. I’ll come out once he’s dead.”

This is the story of an immortal who first struggled to live in the world of magic until he became strong enough to slaughter endless worlds.

Eshwar is the name of the author who transmigrated into his own novel after his death. Eshwar’s death was caused by his own magic which he had yet to control. Why? because I didn't think I would seriously die!!!!

Anyway.... my novel's protagonist is a selfish person. why you ask? because I wrote him and I wanted him to be like me. Muhahahaha, ha.

I reincarnated into my novel!

and that to as a villain who dies in the first half, will I stand still and die?

Of course not, I may have reincarnated as a villain but its not like I will live like he did.

I'll live my life as I want! and kill all the other villains.

Why? because I love the world I created, hahaha, ha.... (real reason: I love to fight.), who else will get the chance to look at the world they have created?

System I created is messed up for some reason and is doing everything on its own!!???

we'll see how it turns out with everything messed up, well(sigh...)

Oh, but because i have reincarnated as a villain, I got a new problem and that is,

I'm handsome (sparkles), I have to say, handsome people have their own problems.

Betrayed. Alone. Forced to survive the deadliest dungeon in the universe. As a Tulland dreamed of adventure. To be someone who sees every-place, goes every-where, and does every-thing. All he wanted was to go beyond the confines of his tiny island. So, when the Church denied him a class, he turned to the only other being that could grant him his wish; The System. And the System delivered. Tulland got Class, but not one he ever wished for. Awakening as a Farmer, he finds himself in the one place where he can grow away from the clutches of the Church — The Infinite; a dungeon whose end even heroes of old have never seen. Armed with what dregs of power the System deigned to give him, Tulland will have to figure out how to survive, and cultivate, the universe’s deadliest dungeon. Expect: + Progression fantasy with actual farming! + A very stubborn MC + Combat! Action! Plants!

Neuer travels through the world of pirates, is adopted by Bermer, and becomes Nami’s older brother!

The Awakened Talent Copy System can copy anyone’s talent in a certain aspect at will!

What kind of experience will it be when Neuer has Shanks’ domineering talent, Kaido’s physical talent and Hawkeye’s swordsmanship talent?

Even the ability of a devil fruit can be copied by the system as a talent!

Many years later, Neuer turned the sea upside down with a talent that surpassed everyone in the world.

(Slow and hot text, slow development in the early stage, and random waves afterwards)

- Description from novelbuddy