Start the Dungeon from the Immortal Demihumans

Lin Mo died in a car accident, but he came back to life and woke up. Before he could figure out whether this immortal ability was a gift or a curse, an anesthetic needle brought him an eternal prison. Imprisoned underground without seeing the light of day, undergoing experiments day after day. Until a letter appeared in his cell out of thin air. A letter that only he could see. (Unlimited comics + Asian + cold-blooded)