Fusion
Ryu felt time dilate. He realized there was a natural shift in time within his body, as though he had his own personal time dilation whenever he entered a state of cultivation.
He understood immediately that this was one of the innate abilities of his Bone Structure. He could actually dilate time depending on the strength of his vital qi, speeding up his cultivation speed with great ease without suffering even the slightest bit of distortion.
Ryu faintly nodded to himself. This was probably the basic ability that underlied on the extended benefits of his Bone Structure, and it made sense that he would have it. This was what he had been reflecting on to begin with when he had a breakthrough in comprehension, so the fact that the Heavens had gifted him this sort of ability seemed to be in line with expectations.
This, of course, made things even easier on Ryu.