MTL - They Regretted it After Their Hearts Turned to Ashes - Chapter 9 relic

Jiulong Continent, ancient times had Nine Dragons!It is said that one who obtains a dragon can stand above billions of people; one who obtains nine dragons shall become the ruler of the continent!Young Yun Xiao, in an attempt to save a treacherous individual, suffers severe injuries to his meridians. However, he experiences an extraordinary twist of fate and rises from dire circumstances. He merges with the soul of the Dragon Sky War God and is reborn, thus beginning his own legendary tale of defying destiny.“Eh? Isn't this a parasitic wasp?”“Who says it is a parasitic wasp? Have you ever seen a golden parasitic wasp?”“Even if it is golden, it's still a parasitic wasp!”“No, it is a dragon!!!”

I opened my eyes to find myself in another world. For some odd reason, I ended up as a sword. Before my eyes laid a plain full of magic beasts, and so, I launched my body and flew in search of a partner, a wielder (females only).

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

To treat her sick brother, she was forced to marry him in place of her cousin, who was disfigured and paralyzed. At first, their relationship was purely transactional, with neither caring much for the other. But after going through a lot together, they fell in love with each other. He doted on her deeply.She was considered an ordinary person by the world, but it was later discovered that she had multiple identities - a mysterious underground boxing champion, a highly-skilled doctor, and a mysterious and renowned composer... He also realized that their fates had been intertwined long before they met.