I need an area water spell .
It displays but it's huuuuuge and looooong (and always displays in a set spot on each map, instead of on a target). Definitely not appropriate for a spell. Off the top of my head, I know the Geomancers Water geomancy spell (Aqua Ball? idk) will display on multiple targets given the chance, so it'll work for an aoe water spell.
That effect particularly wouldn't work well because it can't display damage.
I know someone has removed leviathan from the leviathan effect to just get a water spell that wasn't a summon... not sure where the hell that is. Thing is, it would be pretty useless to you unless you figure out how to replace Effect files in WotL. Never heard of such a thing done by anyone.