Kil'sorrow Fortress Mana burning

[Ev]

After killing a mobs in Kil'sorrow Fortress, you will get mana burnt. No mobs around, not under attack. Happened on two characters now.

 

Character: Ev & Water

Server: Moonwell x5

Edited May 25 by Ev
More data

[Healstrike]

What shows combat log ? Which mob exactly did that ?

[Ev]

While mana burn hits me, logs show no activity.

[Ev]

Can be closed! Figured it out. Was the ice nova they cast.