MTL - Virtual World: Close Combat Mage - ~ The first one is related (related settings)

Doomsday comes, and human beings enter the heavenly world.
Ten years later, Yang Chen, who was betrayed tragically, returned strongly with the Tianyu bug. In this life, he vowed to make the betrayal pay the price. He has a powerful bug bonus, just like an open hang. Frightened to hear…

- Description from novelbuddy

Necromancer】, Originating from ancient Europe, these mysterious wizards were often male, knowing how to summon and enslave the souls of the deceased to create undead creatures. Usually, those who practiced this craft had frail bodies, pale complexions, and twisted psyches, shunning and distrusting others. Some, who mastered the art, could even trade their flesh for an immortal Lich’s life. But can someone tell me how to practice the art of necromancy in the 21st century? In a law-abiding society, I can’t even get a skeleton! Misumi Mikoto: Doctor Chen, come quickly and help me examine this body; I can’t find the cause of death! Jounouchi Hiromi: Doctor Chen, come check on this patient first; what exactly is wrong with him?

Sylas Gray returns to his hometown in the countryside for a winter vacation to his ancestral home, only to find himself caught in the midst of an apocalyptic outbreak. The world descends into chaos as the undead overrun everything, and the small town he grew up in is no exception.With hope dwindling and death lurking around every corner, Sylas witnesses unspeakable horrors—brutal killings, betrayals, and the darker side of human nature. Yet, amidst the despair, Sylas refuses to give up. Determined to escape the town and reach the capital, he is thrust into a shocking revelation.A mysterious change occurs within him, granting Sylas the ability to sense and control space. He discovers that he possesses a pocket of space within his own body—a power that could be his key to survival.Follow Sylas as he embarks on a perilous journey, fighting to survive, uncovering the truth behind the apocalypse, and discovering the true potential of his newfound abilities.

“Look at you, you were this teeny-weeny when you were little.”Using both hands, Shao Zifeng gestures how small his pet beast used to be. He then raises his head and looks at the gigantic being in front of him.“Just how did you grow into this ferocious form?”