[Rescue Mission]

"I think..." Cassandra trails off, focusing. She crosses to the center of the room, then stands perfectly still, head tilted as if listening. Which is exactly what she's doing, of course. Using her ears, to start with - listening for wind, footsteps, subtle noises caused by movement, but then paying attention to other senses beyond the physical.

A quick pulse of magic should reveal any invisible lurkers, followed by a fast-flying set of glimmering golden shackles that she slings soon afterwards, looking to bind up the sly skulker.