Tried mythical frostblade today, couldn't get it done w/ 5 man party =(
Got to the highlord, and the one before it reset midway through, then decided
it
was going to track fast as well. So that was nice. Why a mob resets less than
3 minutes after you've killed it, particularly a quest mob of that size?
I don't know, but I do know that's quite dumb and more than a little
irritating.

Wasted 2 hours of 4 peoples time and my own. Good times!