"He just passed the Level 30 Realm Breakthrough Assessment and is short on Experience. I believe he'll be entering a dungeon again soon, so you all should continue testing in shifts until you confirm he has entered one."
Since the Designated Invasion Scroll can specify a particular target, all you need to do is repeatedly select that target. If the opponent is not currently in a dungeon, The Heavenly Path's Hint will inform you that they are not inside a dungeon and cannot be invaded. In this way, the Designated Invasion Scroll will not be consumed, and you can repeatedly activate it until you confirm the opponent has entered a dungeon. If it's a dungeon that allows invasion, The Heavenly Path's Hint will warn you of the danger, at which point you can still cancel. Therefore, if you hold onto a Designated Invasion Scroll without consuming it, you can indefinitely check whether someone is in a dungeon.
