I am pretty sure these are Ebon Mask. Using an enchanter I tried all player races and this mob cons identical for every race to a tier dal assassin, which is Ebon mask. Not definative, but all the values matched. A very good bet,
When I was level 13 I could kite like 5 of these at a time(yellows,whites,and the occasinal blue) with stinging swarm.They didnt drop much.Only Dark Elf Skin and afew silver and copper.
These mobs are the "hidden threat" that you must uncover for the fourth trial (misty shrouds) given by V'Lynn Renloe in Plane of Knowledge. Once you discover them, the next step in the quest is to kill 4 shadowed assassins.
As a Cleric I was able to pull each of these individually using Furor and take them out one at a time. You just have to pay attention as to which one you have selected and in which direction you pull them.
My Druid hasn't been able to use Harmony against these ladies... and it's isn't fizzling. It looks like it's working, but once I attack one of them, the others attack back. They're all dk. blue to me, so I'd like to take them out one at a time.
Harmony will be broken if you pull one so as to come within aggro range of another. Usually you harmony them, then pull one off to the side, if you have it "brush" too near the others, you get the ones closest to the one you pulled. Also, it doesn't last a long time. You will never get a message from it, only that you cast it. If you have spell effects on and are close enough, you can see it work, but that will be the only indication that they *may* be harmonied
i believe harmony only works when u try and cast a spell cuz when i harmony the guards it says it took hold and then if i cast ignite to pull only one comes but if i go up there and attack one they both come so i believe u must cast a spell to make harmony work