Planar Disk

Source: Natalie's Setting

This is a flat, obsidian disk rimmed with mithril and is 9 inches across. The outer mithril ring has two bands which turn independently of the disk and each is lined with symbols. The inner disk is featureless except for a single rune etched on one edge.

You can use an action to cast the plane shift spell. When cast in this way you may only use the spell to teleport up to 8 creatures to a plane or to a teleportation circle. The spell cannot be used to banish creatures.

Once used the item requires 7 days to recharge.