"Elemental Hate" generally has a major drawback of being too situational. I think that is the case here.
This card's ability is pretty pointless except against opponents wielding aether... in MtG color-specific cards don't sufffer so bad because thats about 1 in 5 opponents. In EtG, it ends up being 1 in 12. Thats less than half as useful.
I like the idea of a limited destruction ability though... what do you think about making it only able to destroy permanents that match one of the players' marks?
Its not guaranteed effective (since even some monos use off element marks). But its a whole lot better
wording could go something like:
"Specialist evades cards from opponent's mark element.
: Specialty - Destroy target permanent of evaded element."