Explorer Of Cosmos

A war veteran from Earth, succumbing to concealed injuries, dies in his home and is reincarnated in a high-level magic world where mages compete for truth and immortality. Accompanying him is a powerful system that grants him access to a multiversal shop, allowing him to acquire scrolls, treasures, and the secrets of existence. In this new world, Samael must ascend the magical hierarchy, battling across other universes and ultimately confronting the very essence of existential threat.