Alright, now I feel obliged to provide at least a bit of feedback 
Thematicaly this feels great,not much more to say there.
Creativity is certainly present especialy with the trait.
Interaction is probably the only āproblematicā part.
First, maybe Iām missing it but does Unstable Energy act as health when interacting with enemy dmg (and as an extension other effects)?
Second, I think Ulrezaj would have hard time moving around the map which would make him considerably weaker on larger maps.
Third, I find the idea of Confusion to be quite terrifying to play against but at the same time for being something associated with Dark Archons it isnāt used much in his kit (it may be for the best though 
).
Something similar applies for Hysteria because right now it would IMO be relatively weak (thanks to short duration) but any buff could easily make it very difficult to play against.
Last but not least, Iām not sure about Khalis focus as it would IMO encourage solo play from Ulrezaj.
Overall this kit it full of great strenght and weakness making it somewhat polarizing to play both as and against, nontheless I would like Ulrezaj as an addition to HotS.