Obscurers are technological devices in the Lost Cities that hide the user or users (groups of users need to be close together) by bending sound and light around the user/users, similar to a force-field. An obscurer resembles a small black orb with thin silver swirls curling around it, and it is about the size of a human or elven palm. They were created by Lady Iskra, a renowned Technopath. All any observers of someone or something obscured can see or hear is wind and a slight distortion in the air, similar to heat waves radiating off the ground.
They are common in the Lost Cities, so are used by The Council, The Black Swan, and The Neverseen - especially when navigating The Forbidden Cities. In Legacy, Lady Gisela says that obscurers can be detected, and manipulated.