He had once worn those shoes himself, and he could immediately feel them freely growing or shrinking to fit his feet.
Moreover, after putting them on, no matter how far he walked, his feet would not hurt. In fact, taking one step in those shoes was equivalent to walking ten steps normally.
As for why Uchiha Hiko wanted those shoes from the Bull Demon King, it was simply because the two of them had obtained them together back then.
However, the Bull Demon King's martial arts had not been so formidable at the time, while Uchiha Hiko's Ninjutsu had been exceptionally powerful.
So, Uchiha Hiko had yielded directly that time and given those Four Seven Three shoes to the Bull Demon King.
After obtaining those shoes, the Bull Demon King had indeed worn them for some time. Not to mention how convenient they were for escaping.
They were also incredibly light and easy to use. No matter where he went, he could arrive at the fastest speed. That was the very reason the Bull Demon King loved those shoes.
But in Uchiha Hiko's view, he had enough Chakra energy within his body, so he simply did not need those shoes to walk for him.
The Bull Demon King's martial arts had also been quite poor, and Uchiha Hiko had given him the shoes entirely so he could save his life in a critical moment.
After the Bull Demon King's martial arts gradually improved, however, he abandoned those shoes, placing them beneath his cabinet and never using them again.
Because he knew perfectly well that those shoes were an incredibly powerful cheating tool.
And he wanted to become a Grandmaster like his master. Using such a cheating item would certainly bring him no benefit.
So he chose to give up those