Board Thread:Mortal Kombat X/@comment-21005855-20170314013445/@comment-422853-20170704013828

Well they used to establish that Raiden couldn't have his godly powers outside of earthrealm and would become mortal once he step foot in any other realm, so I reckon an aquatic character would be able to use their powers anywhere, although perhaps more efficiently when fighting within their realm of origin.