Now inside of the danger zone you can see Alex and his teammate already came to that part where they need to search. Even though the king send them here but still it was a very big area where they needed to search around and then you did to do everything very silently so even a Spy from other Kingdom present they are they will not get alert by them.
As you can tell he will naturally use the power of the shadow and with that it will be easier for him to search around and nobody will be able to detect him because he will be present in the shadow world. But at this time he was also curious about his partner and wanted to know what technique that person will use so he turned his head toward him but got surprised because that person wasn't present there.