Reincarnated Skeleton Monster, I Can Upgrade and Evolve

I'm alive! He's actually a skeleton, yet he doesn't feel tired? Okay, innate mad liver holy body! On the first day of time travel, Lu Sen was captured by mercenaries, and people called him a high-priced special breed; During the first evolution, Lucen continued to learn new magic, and people called him a wise skeleton monster; In the second evolution, Lucen roamed the outskirts of the Undead Mountains. People called him the nightmare in the forest. It was rumored that people in trouble would be saved by him; The third evolution... … When Lu Senmu Ran looked back and glanced at all the monsters, he realized that he had reached the highest point and was the well-known Death Sage!