[There was a time, not too long in Wesley's past, when Illyria being so easily stripped of her power would be a cause for relief. Now, however, the thought actually fills him with a certain dread.

Not only because he no longer had the potent (if mercurial) ally he'd become- despite his own misgivings- somewhat accustomed to, but because that meant the beings who brought them here were capable of so effortlessly stripping Illyria of her potency. If even she couldn't overcome this place, they were truly at the mercy of their new hosts.]

It will be temporary, if the secretary is to be believed. To a being such as you, I'm sure the timescale will be infinitesimal.

[It's the most pragmatic comfort he can offer. Not that he's certain why he feels the need to reassure her, but he does all the same.]