Warning: Illegal string offset 'type' in [path]/includes/class_postbit.php(294) : eval()'d code on line 65 Hellpower. What the hell? - .com.unity Forums
There's been a strange bug reported where a spell is reported cast but actually isn't and the same mage casts another one that round. This sounds like another instance of that.
Not specifically linked to Hellpower, though I don't remember if there's anything known about what triggers it.