Toaru Majutsu no Index - Volume 21, Chapter 8: Their Many-Sided Counterattack. Combination.

True evil needs no reason to exist.

“All living creatures must die, but I wont. ”

Once known as the most talented and knowledgeable scholar/philosopher across three continents, he basked in the praise and reverence of those around him. However, tragedy struck one fateful night when he bore witness to the cold-blooded murder of his entire family. Driven to madness, he embarked upon the path of power, the path of negative energy, and thus, The Great Demon, Badur, was born.

In a single day, a mountain of corpses were stacked, many of which fell to his blade. However, during his final pursuit of revenge, he met his untimely demise. His soul was extracted and cast into the void, where it would endure eternal suffering.

However, his jouney would not end here……

“What do you desire?”

A grotesque creature floating in the void asked while staring at the bruised and beaten soul of a young man.

[Ding!! Host has received Void grade Treasure]

[Ding!! Goal has been set : Attain True immortality]

A new lease at life is presented

A deal with a Demon filled with resentment

A new journey, a new Dawn

With that the great Demon, Badur is reborn

ps: the book won't progress the way other novels have been progressing. if you don't like a unique development then maybe this isn't the book for you.

My name is Chen Huai’an, and I have cancer. I’m dying. Lately, I’ve become obsessed with a virtual girlfriend game. I top up my account to buy her cultivation techniques and magical artifacts. Even though I’ve emptied my wallet, I laugh like a fool. I always thought it was just a game—until one day, my virtual girlfriend sent me a pill. The next moment, the pill appeared in my hand… Am I… not going to die?!My name is Li Qingran. My cultivation has been crippled, my spiritual roots dug out, and I’ve been expelled from my sect. I cower in a dilapidated hut, waiting to die. I thought my life was over—until I met a mysterious senior who never shows himself. This senior heals my wounds and helps me cultivate. I grow stronger and stronger, eventually becoming the most powerful sword cultivator in the Cangyun Realm. I’ve heard that the spiritual energy in Cangyun is depleting, the Dao is dim, and an immortal from another world plans to merge their soon-to-revive realm with ours. An age of chaos and opportunity is upon us. Even immortals may face death in this struggle. I scour the world for traces of this senior. I want to protect him—and become his Dao companion!!!

After Xia Feng transmigrated, his heart was mysteriously removed.In its place, a defective demon heart capable of sustaining life only for eighteen years was implanted.This is a magical heart that can sync with the power level of its target.To stay alive, he bound himself to the ultimate villain of the future, a Destructive Witch who was destined to destroy the world.The stronger the Destructive Witch becomes, the stronger he becomes!Thus, Xia Feng realized, it's not my fault for stirring up trouble: “Miss Witch, I admit you're strong, but not strong enough!”

Science and Technology Library: The supreme state of science is theology; an accidental rescue, let Chen Mo get a technology library that collects endless technology, the story begins…

- Description from xbiquge translation