[quote=@Fabulous Knight]
[@Hael]Assuming they don't shift out of the material world, there'll be ways to detect them with occultism. They'll show up in the submaterium.

This will definitely be more difficult than detecting their souls, however.
[/quote]

Awww, well in that case, it'll be HARD AS FUCK to detect them. They use shapeshifting, texture changing, colour shifting, flying, highly advanced magic, soul manipulation, Telepathy and the power to turn semi-physical all at once to essentially be an invisible cloud that you can walk through and barely feel.

It's not easy for them to do this, and it's actually very painful, but it makes them invulnerable to atrack IF they aren't take by surprise. If they are surpised... they fall like dominoes