Electric Necrotic Grasp
It’s a combo finisher. You’re probably standing in well of blood maybe and that’s what is causing it I think.
I thought about that too. There have been no combo fields on the grounds and it continues for about 10 attacks before the animation is off. I’m starting to think this could be a bug or something.
Are you using Sigil of Air (lightning on crit) on the staff?
Not from sigil either. I have a luck sigil on and my gear is MF with runes. I have turned off all my combo fields and running alone. After a little more testing I think that my necrotic grasp is picking up enemy combo fields and lingering. Not sure if it is something worth reporting as it doesn’t break anything.