has some kinda of poison DoT, didnt get time to look at it but i was 3 boxing and by the end of the fight my enc with 30% spell shield and 25% Dot Shield was about 35% health (out of 14k hitpoints) and i killed him pretty fast, so i would say it did a total of almost 10k dmg over the course of the fight. i dont think he casted it til he was below half hp. i should have gotten the name of spell and more info but oh well.