They do!! Verjigorm is actually a very fluffy little bunny that just wants to be petted.
Honestly, ALL the Earthdawn magic exists in SR - but because of the barely-over-the-line mana level, most of it can't be executed. Name magic (i.e. true names) exists in SR - look at free spirits - and is, honestly, one of the most subtle ones in Shadowrun - but only the Superpowered NPCs probably know how to reeeeeally make it apply to entities that aren't free spirits. Which means that for the purposes of the game and most PCs, it doesn't exist. The rules for it certainly don't.
Which means, of course, that Joe is yet again claiming canon for his own wild hair-up-his-arse decisions.
Joe, repeat after me: "Unless I can go back and point to specific things within SR canon - giving book, page, and paragraph - without referring to either Earthdawn, my home game, or my personal theories - I will preface everything I say with 'I think', 'I believe', 'It is my theory that', or something similar to make it absolutely clear that I am not claiming canon, misleading the newbies, and/or attempting to make myself look like an ass."
We'll respect you a hell of a lot more for it - and we'll actually be able to have discussions with you instead of the standard 'shut up, Joe, you moron' responses that we come out with whenever you post. Trust me, we really WOULD like to talk about this stuff with you, but since you post as though your ideas are canon, all we can do is hammer you for them.