The man still looks rather frightened, but will explain, briefly, how the portals work; each portal connects only two separate planes together; most planes connect to three or four others, though this one he arrived in is a dead end. To get where he wants to go, he'll need to cross vast distances, since most of the portals are hundreds of miles apart, all established as a defense system against invaders from Beyond. He'll also explain that, while he doesn't have a map of the entire portal network, he can route Draiss in the right direction, though it's going to be at least ten portals, between here and the outer planes, where Draiss' domain is located.