At the begining of this dungeon/fractal/mission. Where you have to kill the Krait to free the hostages.
The problem is: That the Krait swim up through the roof/rocks/ceiling. Making them unable to hit. Worse yet, if they have dots on them, they swim up there and die, and you can’t loot them. This is a problem cause that might have been the Vial of Condensed Mists Essence you need.
I suppose that NPC’s should have “Zone Walls” too. Or, something?