Darkness: Transformation into a Demon King from Another World

I suddenly collapsed on the street and was sent to the hospital for an autopsy. I was still conscious but unable to move. But he finally managed to escape, but it was badly damaged in the process. He thought he was finally safe but was run over by a car and reincarnated, only to become a zombie again. And this time, all the flesh was completely rotten. What will happen to me, what should I do? After defeating the enemies I encountered in the reborn dungeon, I eventually evolved into a skeleton! Great, I did it! Help the dark elf girl who was betrayed and abandoned in the maze, and the halfling girl who failed in the assassination due to being framed by the assassin organization she belonged to and suffered a counterattack. Together we evolve as servants of darkness. The most ferocious slimes also joined our team, and we began the legend of evolution. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.