I Became a Calamity Boss in a Dungeon?

[Extreme Body Tempering] [Dimensional Collision] [Pure Disaster-Fighting] [Decisive and Ruthless] [Maximum Knife-Sugar]

Pale, sightless eyes hang overhead as endless ashes drift down. Anyone who steps into the shadows calcifies into stone in an instant. The only way to survive is to keep a refuge's fire burning.

To stay alive, anatomy intern Li Chen takes up bone cutters and severs diseased bones. Starting with a single deformed knuckle, he forcibly replaces all 206 bones in his body with dreadfully evil things!

He has seen the old man who taught him to identify bones get devoured by the dead while guarding the fire, managing to recover only half a withered hand. He has also seen a fierce young woman smash an immortal's manifestation with her hammer, only to dig out a