Ring of teleport control

Wearing a ring of teleport control (or ring of TC) conveys the teleport control intrinsic. This is an incredibly useful intrinsic (especially when combined with teleportitis).

One of the ways to identify a ring of teleport control is to teleport (usually with a teleport trap) while wearing an (ideally noncursed) ring. If you can choose your destination, you have the teleport control intrinsic.

Dropping a ring of teleport control into a sink produces the message, "The sink looks like it is being beamed aboard somewhere."