Skye flew for a full day. In that day, Gravis ate a lot of body tempering pills. He didn't need to destroy and reforge his body for it to become stronger. The only reason why he had done that with the Body Ascension Pill was that this was the only way how the pill would work. The other pills simply strengthened the body without destroying it.
In that day, Gravis ate about a third of the pills and reached the peak of the seventh level of the body. He still had some time and could increase his bodily power into the eighth level, but he stopped. If his body were at the eighth level of Energy Gathering, not many people would dare fight him. Like this, he would maybe not get enough pills to reach the tenth level.