Under Doctor Chapter 32 Raw Spoilers

In chapter 32, the fate of the underground city reaches a breaking point. Dr. Kai unleashes the forbidden technique 'Circle of Blood,' sacrificing his own flesh to transfer patients' injuries. He confronts Iron-Mask Clan, the tyrant controlling the city's oxygen supply. Though Clan’s nanomachine weapons ravage Kai’s lungs, Kai smiles defiantly. He reveals a hidden collection of immune data harvested from every patient he has ever treated. These antibodies neutralize Clan’s weapons instantly, shattering his defenses with a single blow. Ultimately, Kai secures not Clan’s heart, but the 'Reboot Key' needed to liberate the city. The cost, however, is his sight. As he whispers in the darkness, 'Finally, we are equals,' the underground city begins to collapse. Meanwhile, the shadow of the Central Government creeps closer. The story now accelerates toward the uncharted territory of a full-scale surface invasion.