Alpha's Rejected Mate Returns as Queen - Chapter 616 - : The Body’s Choice

In an alternate timeline of Warhammer 30k, the Emperor of Mankind discovers the Independence Cluster, a group of technologically advanced worlds that have preserved Dark Age of Technology knowledge. Here, He encounters His first found Primarch, Franklin Valorian, known as the Symbol of Liberty.The charismatic and humorous Valorian, standing 15 feet tall, meets the Emperor with a mix of curiosity and irreverence. Unlike others, Valorian sees the Emperor as a powerful but regular man with a greater purpose, akin to a superhero.

Xia Yan passed through to the world of Bleach and became an eleven-year-old boy. He was rescued by Renji and Rukia in the Seireitei, and he was studying at Shin’ō Academy, and he was a student of the same class.
He is a top student of the Shin’ō Academy, and he is vying for strength by various teams. In the end, he has entered the first team of secret mobile maneuvers.
He will use punishment to kill every person who tries to threaten the martyrdom and protect his loved one.

- Description from Novelupdates

Before going to college, an ordinary high school student went to celebrate and got drunk. When he woke up, he found himself in a completely different world. There was a big sect, the approaching sect entrance examination, a slum where his body’s previous owner lived, and a shared memory about a missing young girl.

When he got tangled in a fight with a few punks in this different world, he fell off a cliff and miraculously found himself still alive, with two more voices ringing inside his head. They were Sword Master and Saber Master. In the company of them, he continued to find out more about this whole new world. He took the sect entrance examination, entered the sect, met a strange man in black, and even participated in a major competition of the sect to have a chance to win over his peers!
In this whole new world, he was born again and got to explore the fantastic martial world!

- Description from Novelupdates

The whole world mutated. Mysterious resurrections happened in real life. The Tribulation descended.