I Turned My Corpse into a Monster

An He stood quietly in the rental house. He looked at his slightly transparent hands and feet and the shriveled corpse that was almost identical to his own lying under his feet, and showed a terrifying smile. He took out a dark red test tube from the system and said, "It can't be wasted." He slowly dripped the blood in the test tube into the mouth of his shriveled corpse. Then a monster opened its eyes. … Three days later, a new rumor emerged in City X: a huge and strange creature covered in blue with ghost horns. Constantly preying on monsters in the vast darkness, this blue ghost is extremely powerful. And he seems to have an immortal body and is extremely fond of eating the blood of monsters. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.