Toaru Majutsu no Index: New Testament - Volume 13, Chapter 2: Run, or Die — Chase_With_the_Girl.

One moment, Luo Jing was at the brink of death after accidentally touching a power outlet while showering. The next, he was in the body of a man named Garen, with memories of a past he was never a part of flowing into his head. As he slowly gets used to the body of Garen, he begins to explore a planet beyond his own logical comprehension. His journey will see him go from surviving in a planet locked in the 20th century, to wielding secret techniques so powerful that they level cities overnight. However, his journey doesn’t end with Garen. Instead this is but the first of many bodies that Luo Jing will come to wield in his mystical journey between worlds.

Everyone told Wei Yingluo that her sister had taken her own life. But the mark left on the corpse told a different story. To unearth the truth, she entered the Forbidden City during Emperor Qianlong’s 6th year of reign.

After investigation, she found her sister’s death related to Prince Hongzhou, and became determined to avenge her. The kind Empress Fucha, worried that Yingluo would stray onto the wrong path, took her under her wing. With the help of the Empress, Wei Yingluo grew to be an honest and strong female official in the palace, letting go of her resentment and living her life seriously from then on.

Yet the Empress passed away unfortunately, causing Yingluo to misunderstand Emperor Qianlong. Hostile against each other, could they understand and support each other in the end?

- Description from Novelupdates

When he woke up, Lin You found that the world had changed drastically.

Monsters of all races roar and bombard wildly, field magic cards form a deep sea out of thin air, royal tombs, skyscrapers, and trap cards are infinitely possible.

Duellist colleges and universities all over the country are rising, and the miracle secret realm is full of dangers.

This is a world where all people chase cards, and the era of card duelists shines.

- Description from novelbuddy

On modern-day Earth, An Lin seems to have been abandoned by God.
When his father suddenly disappears, An Lin is left with his father’s immense debt, putting his life at risk.
After being forced to a rooftop by his pursuing creditors, An Lin is unexpectedly swept off his feet and brought to the ground safely.

After learning that he was saved by an Immortal, An Lin is gifted, seemingly out of pure generosity, the ‘God Of War System,’ and a pass to a new realm.
Follow An Lin as he experiences a whole new world of legends, meets many new friends, acquires legendary weapons and tools, and starts on his path of becoming a powerful cultivator. There is never a dull time in An Lin’s new life with his ‘great’ new system!

- Description from Novelupdates