Badge of the Wayfarer

Given to Natsu by Tsukiko, this badge is formed in the shape of an open doorway.  While wearing the badge, you can tap on it and concentrate for 1 minute to cast the plane shift spell using the badge. When cast in this way, the spell's destination can only be The Wandering Tavern, an inn and pub of legend that drifts throughout the astral sea. The inn has no doors leading outside and can only be entered using the badge. Inside, the tavern is large, comfortable, and decadent. It's frequently busy, despite its exclusivity, but always seems to have enough room and beds available for the wayward band of adventurers. The inn is expensive and suited for an aristocratic lifestyle, but is known to be willing to barter or trade for treasure, information, and favors.
You can use the badge to cast the plane shift spell again in this way to return to your original location, but if you remain at the tavern for too long the badge may return you to the wrong location.  Tsukiko said this was not previously the case.
(based on an item by the same name in Griffon's Saddlebag)