Bone Zoned (trap idea)
Here's one for you Dm's that want a trap that's based around teleportation! The players are going through a dungeon, when they come across an empty thrown. The thrown is made out of bones & has blood red padding cushions. If any of the player sit on the thrown, they will be instantly teleported to a dimension made of only bones. In their, will be a couple of skeleton enmies. To get back home, the player in the bone zone, must find a thrown made of flesh. When sitting on this thrown, they will be teleported back to their home dimension. Other ways of getting them out, include casting de-cursing/teleportation spells within/outside of the bone zone.