This change could not be detected by the Death Steel Soldiers and Metal Ancestor Dragons outside the Illusion Space, unless they personally entered here.
"I can now stay in the Illusion Space for about 30 minutes..."
Noland Lee discerned his location and flew towards other areas, avoiding the Starry Sky he had already explored.
During a previous contact with the Assassin Angel, the angel had confirmed Noland's speculation.
If that was the case, he might as well keep going.
If it came to it, Noland was prepared to risk alarming the Metal Ancestor Dragons, forcefully reclaiming the players' controls, and letting these players help him find the answer.
While Noland was searching for planetospheres, he did not stop trying the spells given by the Assassin Angel.
Since the angel had specifically emphasized starting from the top and trying each one in order, Noland could find at least three spells that greatly slowed the flow of time, and the effects of these spells could be stacked.