Simply put, Ye Han had three sticks of incense time to find the medicinal herbs for refining the Green Spirit Pill within the Saint Realm, and to refine this Green Spirit Pill.
"Before the competition begins, we have two important reminders. First, spiritual power cannot be used within the Saint Realm; only spiritual soul power can be employed. This is also an indirect test of the alchemists' soul power."
"Second, do not attempt to cheat, because inside the Saint Realm, a sacred treasure called the Sky-Scrutinizing Mirror is monitoring everything throughout the process. All actions within the Saint Realm will be monitored by the Sky-Scrutinizing Mirror. Therefore, anyone caught cheating will be disqualified from their results!"
Chapter 482