Pretty sure youve seen this on a similiar thread


Quote Originally Posted by Carapace View Post
I can confirm what you are eluding to, Obsidian and Hargkyth do not take damage from Fire Aura. The feeling you have from damage output regarding Dark Binding has to do with his Healing Obsidian Stone. Since Dark Binding and Vermin swarm do damage over time, the effects of the healing are keeping it more or less level while the Obsidian is up.

I could go into more but it's way more entertaining to see the strategies you guys come up with to deal with his buffs!

In regards to his "damage spike" inside the fire bubble, there does appear to be a minor visual glitch in where he does not properly do the animation. If you get hit heavy and knocked around you were hit by an appropriate ability, but the animation did not fire correctly.