Koko wa Ore ni Makasete Saki ni Ike to Itte kara 10 Nen ga Tattara Densetsu ni Natteita - Chapter 135 - Kathe’s House

When a glowing portal yanks Leo from his struggling existence, he is saved by a mysterious system which gifts him new chance to break free from his side character experienceRebuilding an abandoned guild to honor his family’s legacy, Leo finds himself under the evil eyes of monsters, both from humanity and the gates he ventures intoin short : overpowered necromancer building a guild.

I exist in the darkness, disappear under the bright light, and will eventually devour the sun and turn into the shadow of all things… Known by people as the indescribable terror of darkness; the king of shadows; the dark day; the existence of the shadow of the world , is still just a somewhat special high school student, facing a weird death game…

- Description from novelbuddy

After working and pulling an all-nighter studying for W City University, Josh Lyonne has a heart attack in the middle of an exam and is rushed to the hospital. He dies and is reborn as a baby tiger in the virtual beast-taming game world of Tanglewood. In front of him is Kaline, a young girl with her hand placed on his head. After a strange sensation, he feels a bond between the two of them. He is now officially a tamed beast, and the young girl is his tamer. Explore the world of beast taming from the perspective of a tamed beast.

With the unexpectedly obtained unknown civilization technology, bionic robots, artificial intelligence, quantum mechanical transmission, supercomputers, plasma thrusters, nuclear fusion, these black technologies are constantly being manufactured in Wang Xiao’s hands.

Knowledge is power. With the help of unknown civilization technology, Wang Xiao, who has acquired this knowledge and black technology, has tickets to a better future and a sea of stars.

- Description from Qidian