I think you could probably brawl with it. But I it as more of a Collector's item like Bronze Attack.
Bronze Attack are not collector's items, they're made JUST for brawling (powerful cards that work just for them anyone?)Also, the Naga has no attribute symbol so you could use it, but it would be kinda weak, seeing as how it would get no bonus from the gate OR abilities, and cannot be used with a trap.