Naruto: Kurotsuchi Mayuri - Chapter 299 - 208 : Spirit Suppression Stone!!

Li Feng found himself in a dangerous demonic sect where he could be killed at any moment. But he was worried as he had his ultimate upgradation system.Blood Essence Pill -> Blood Origin PillTurtle Breathing Mantra -> Xuanwu's Great IsolationPhantom Spirit Fox -> Nine Tailed Celestial FoxJust like that, Li Feng was confident that he would be able to become stronger at a very fast pace and would be able to survive in this dangerous demonic sect. Not only that but as his parents were killed by some of the disciples of this demonic sect, he was also going to take his revenge on them. With his system's assistance, Li Feng was confident to reach the pinnacle of cultivation.

Liu Fang, a manager, died suddenly at work due to being too diligent.
She thought that she would turn into a wisp of dust and dissipate after her death, but she never imagined that – the new century, the new underworld, even if she became a soul, she would still be a worker!

Liu Fang has become a newcomer to the underworld Quick transmigration Department. In order to wait for a good reincarnation, she strived to accumulate merit and traveled into one world after another to repair the way of heaven.

- Description from Novelupdates

Xiao Ran transmigrated to a fantasy world. As a dungeon guard in the Celestial Dungeon, with a special floor called the Purgatory meant for powerful demons and martial arts experts, he faced a huge challenge from the start. The Eldest Princess acquired a forbidden martial arts technique and was banished to the Purgatory. However, no one was powerful enough to restrain her. All the dungeon guards were defeated. Xiao Ran stepped up and declared, “Your Highness, it’s better for you to behave yourself on my territory” and effortlessly subdued the Eldest Princess.

He progressed from imprisoning the Eldest Princess to delivering the Great Xia Kingdom from the evil clutches of various demons and evil martial arts experts.

…

Xiao Ran was the mastermind behind the scenes.

Wei Ji never dreamed of immortality or ruling the heavens or having the greatest strength. All he wanted was a sect he could call family — a mark he could leave in this world of Immortals before he dies.But no matter how hard he fought, no matter how many sects he built or rebuilt, the Celestial Demon Empress always came. No matter how high his sects rose, she found them… and burned them to ash. Even at his peak, Wei Ji could not last even a second against the newly appointed general under her command.On the edge of despair, he casts his soul into the river of time, hoping to return to Earth and escape it all.But fate is cruel. He awakens five thousand years in the past — in the mortal world of the Celestial Demon Empress.And the cruelest twist?The woman destined to become the Celestial Demon Empress… is now his wife.