Ye Mo spirit controlled the bone arrows once. The first time it took him nearly 3 years to refine the 48 restrictions. But this was the second time and he was familiar with the restrictions. According to what Ye Mo thought, he only needed less than one month to spirit control it.
One month in the time formation disk was less than half a day outside. It didn't affect him finding things in the palace at all.
But the time formation disk ran for a day and Ye Mo only spirit controlled to the 13threstriction. Ye Mo put away the time formation disk in disappointment. He didn't expect that the restrictions of the second arrow was completely different to the first one. This meant that the two bone arrows were forged with different means. The restrictions were similar but weren't the same type. The person who forged this bow and arrow was a genius.