'It's already expanded that far?'
Izroth did not know about the origins of the Cursed Grounds; however, he was aware of the fact that it was constantly expanding from an unknown point of origin located within Malentansium.
But, according to the texts he'd read, its rate of expansion was abysmally slow. It should have been impossible for it to reach the foot of the Endless Mountain Range within just a single decade. Even if it had ten times as long to expand, it still should not have come anywhere close to it.
'Did something change within the last ten years that significantly increased its rate of expansion?'
Of course, there was also the possibility that everything Ranazera said was a well-crafted lie, and she wanted nothing more than to travel through the Endless Mountain Range for some reason.
Though Izroth found this to be unlikely as his instinct and experience were telling him that Ranazera's words were not false.