Some or most of these see thru invis. They cast a hefty AOE dot that will knock about 4000hp off of everyone in the group in 40 seconds if you dont get it cured. The dot also has a snare component. They have short-ish range on spells and I only got snared when they were near.
Pathing is so bad that even after snared and faded, I could out run some.
Edited, Tue Apr 4 16:02:56 2006