Is there something you can do with Nauxus, or is the entire event just him popping up all of the sudden and you having to return him to his world?
You don't get much outta him during the event. He has some fun interactions with other characters and you can blow him and see his cg art but after all that you send him back. The event was as Bracket said, a promo for Tavern of the Spear. They give us just a lil taste of Nauxus to get people interested in trying it out