Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 16 - 16-1. Effect of Slaying Demon Lord

Damien Julian is an 18-year-old loser, who has been bullied and mistreated his entire life, at home, he has to deal with his abusive father, and at school, he is constantly been bullied by delinquents, and to make things worse he is always looked down upon by his peers, till one day a mysterious screen appear before him as it said.

[The world has seen the lingering evil in your heart]

[Would you like to be one of the nine demon kings of this world]

[If so what are you willing to sacrifice?]

In the heat of the moment, Damien made a deal with the world, that he would give up everything he owns, or do anything it wants, and in exchange, he shall be reborn as a new Demon King, and what the world required from him as payment was.

[In exchange for power, become a slave of the world, and act as an anti-body for all eternity]

At that moment, Damien agreed, but little did Damien know, that becoming a slave to the world meant he has to be its immune system, what that entail is, that anything that threaten the world must be destroyed even if he has to wipe out humanity, to save it, or assassinate historical figures to bring fort balance or even manipulating events that can potentially end the world, to save the world, this is the story of a necessary evil, not the story of a hero who cares for others.

Luciel Ashford was a powerful vampire hunter who fought for humanity's survival in a dystopian world that was being overrun by supernatural creatures.After being sent on a simple mission to eradicate a vampire nest that appeared near one of the human colonies, no one expected one of the most powerful beings to appear - the vampire king, Alukah.In a big showdown that was thought to be the start of a new era, Luciel faced off against Alukah. He won the battle but at a price. That night marked the fall of humanity's hero.Turned into a vampire, discriminated and hunted by the humans he fought for, he is going to answer their call for help once more to protect the people he cares about.Torn between the two worlds, he is going to climb back to the top, forging his own path while still trying to keep his morals intact.“Well, I have a message for you, god. Screw you!!!”_______________!!!WARNING!!!For those who came for the system, you can expect it to see after ch80. Reason being is that the focus is more on cultivation.The system is just a tool for better understanding of the story that's about to come!

He was on his way to buy some beer to celebrate his acceptance as a civil servant when he was suddenly isekai’d by truck-kun.

After dying miserably, Chaos suddenly finds himself reborn in the body of a chimera between a Vampire and a Dragon created by an insane Elder Lich who claims to be his father.

Thrown into a an universe filled with darkness, monsters, dungeons, and gods, he finds himself born as the calamity of the entire galaxy, the primordial evil, an entity that shouldn’t exist!

Packed with a cold-headed mind, a calm demeanor, and the power of both Vampires and Dragons developing within his chimeric body, Chaos will awaken his Chaos Magic, and gain Skills from the monsters that he eats, bringing forth the end of all those that dare come to take his life!

This is the tale of the Devourer of Worlds, the Living Calamity, the Primordial Evil, Chaos!

But was he all of this? Or was Chaos misunderstood?

Watch as Chaos discovers the truth about his origins, and finds a purpose in his new life, and the fate that awaits him!