The Alchemy Palace in the Heaven of Bright Illumination had preserved thirty-nine alchemical formulas in total. Three of them were sealed and unavailable to Luo Chen, while the remaining thirty-six covered the needs of the human, demon, and devil races, with twelve formulas each. The technique Luo Chen had used to save Black King came from one of the demon race's fourth-tier formulas, one for creating a blood pill. By drawing on the blood essence of countless living creatures, it could nourish a demon's body, and, under the right conditions, even allow it to condense a new demon core. For Black King, whose body had been gravely injured and whose inner core had been entirely shattered, it was the most suitable remedy Luo Chen had been able to find.

Over the years, Luo Chen had checked on him from time to time, and Black King's condition had indeed improved little by little. Even so, Luo Chen never allowed himself to take comfort in that progress. He knew better than anyone how fragile it was. Everything...