No kidding? ;)the only thing which would concern me is the unristricted invisiblity. With a power like that I feel this would have to remain an NPC.
Thats why I gave it no LA. No way should it be a player character.
Ermmmm... possibly, mechanics wise. Its not really, strictly speaking, water. Probably need to elaborate on that in the text.would/could the stream have a relationship with aquatic creatures? as an example, could a bunch of aquatic heros team up with a stream to adventure on land by "breathing" from the stream?
Then there is the fact these things don't think highly of mortals. If you had a group made up of Uldras (only Fey I know of specifically made for player characters) though that'd might work.