Toaru Majutsu no Index: Genesis Testament - Volume 3, Chapter 1: A Scab Torn Away – City_Warfare.

Karl awoke to find himself shockingly reduced to a crippled Evil God confined within a bottle.The Fischer family had inadvertently become his favored members, sharing a fate connected by blood throughout the generations.They established a secret clan, infiltrated the state, manipulated wars, ascended the God Pantheon stairway, and fought for the honor and future of the family.They were assassins lurking in the shadows, beloved scholars, esteemed priests, powerful dukes, and legends in heroic epics.From budding to robust growth, steampunk evolved; the Spirit Realm descended through dreams; witches and ancient gods stepped forth, and people listened to the lost whispers at their ears.They were both the creators and the enders of stories.Generation after generation, in a continuous succession, they marched forward.“Step over my corpse and go on,” he said.

Evan crossed over, but he wasn’t worried at all… because he had the character template from the mobile game and five devil fruits obtained from a lottery draw with him.

He had served in the strongest Special Forces, Heavenly Sword Special Force. As the commando of commandos, he created the Netherworld in the western underground world and became the formidable Oriental Yama. He said, “I’m Liu Feng. I’m adept at two things: killing and saving. If I want to cure someone, even ghost soldiers can’t take him away; if I want to kill someone, God can’t save him.” Now he was the bodyguard of Yang Shiwen, who was the daughter of the richest family in Donghai City and suffered from a rare disease. Could Liu Feng save Yang Shiwen’s life with his amazing art of healing? What would happen to his double life?

- Description from Novelupdates

Vahn was an atypical youth. Due to a rare mutation, his blood had the potential to target and attack ailments within the human body. Touted as a universal cure, people had elevated his status above the norm and given him the classification "Panacea". In the media, he was hailed as a great hero who would usher in a new era or human wellness. However, behind the scenes things weren't so bright. Being a unique individual, Vahn spent his entire youth locked up in a lab with various scientists and research teams using his body and blood to perform endless amounts of experiments. The only solace in his suffering was the various anime and manga made available to him between experiments. He often imagined himself as the protagonist in a world of his own, finally in control of his own destiny. For years he nurtured this desire, until at the age of 14 he died when an organization had tried to kidnap him from the lab...