A few minutes passed, but to Damian, they felt like hours and it was extremely painful. The skin around his entire body had become red and was peeling after being burnt by the boiling water, but his face was calm and completed focused on the Golden Flame Body Tempering Method that he was reading within his mind.
Following the steps, there was a series of breathing techniques and muscle movements that he needed to do while also staying conscious and dealing with the pain.
The tempering process and the amount of the medical properties that Damian could absorb depended on how calm and focused he was along with how much his body could handle.
After cultivating internally to rank 4, Damian's body could handle quite a lot of energy, especially after all the battles he had fought, so he should be able to absorb most, if not all, of the medicinal properties.