These things have an annoying mez which lands alot even w/ 300mr, it lasts a FULL min every time it does land on ya.
We can handle 2 or 3 at once w/out mezzes in the groups that i take in there, but i've seen one of these get lucky and mez all the tanks, its very annoying.
I think cold resistance is actually the resist you want against this mezz, not magic resistance. The emblem for the mezz is the cold one; I'll try to look up the effect on Lucy next time I see it to be sure.
Okay, it's called Freezing Touch, it is a cold check with a -400. Here is the link to Lucy: http://lucy.allakhazam.com/spell.html?id=6010&source=Live
I've also found that this spell is not exclusive to Gelidran Frostblades. It seems that every Gelidran has a chance of having this nasty cold mezz ability. The cold side is nasty, because of this.