The King of the Undead, Starting from Being Sacrificed by Teammates

Lorne, a low-level adventurer who was betrayed by his teammates and became a sacrifice, was reduced to ashes in the flames. When he opened his eyes again, he became the meanest skeleton in the underground labyrinth. The flesh and blood have been burned away, but the fire of hatred has not been extinguished. Fate has given a way to salvation. Devour bones, plunder skills; Killing upgrades, explosive proficiency; From the enslaved weak skeletons to the skeletal monarchs who command the undead army; From the undead despised by all living beings to the undead king who crushed the throne of the gods—— "Since the world can't tolerate the weak me, then I will use the bones as steps to reach the top!"