Forcecage

Create an immobile invisible force prison around an area within range. It can be a barred cage up to 20 ft. on a side or a solid box up to 10 ft. on a side. A trapped creature cannot leave by nonmagical means. If it attempts teleportation or planar travel, it must make a CHA save or the attempt fails.

This power has its own stable page so it can be linked from any character, item, location, story post, bargain, curse, or future reward.