Bit old thread, but what the heck...
For my Unseelie Noble Changeling, I've set up a Magical Mirror (works like, well, a homing vidphone, for lack of a better term), which tracks down an object or person and grants two-way communication (auditory and visual), provided there is a mirror in the immediate vicinity. Does not actually provide accurate information on the target's whereabouts, except for immediate audiovisual clues. I'm thinking... 1 Enchanted Item slot for this one? Or does two seem more correct? (For the effect alone - strength augmentations notwithstanding.) Evidently, this is Thaumaturgical Divination-type magic...
Also, there's a little potion I like to call "Midwinter Night's Dream" - which, when sprayed into the target's face, puts them to sleep for a while, and fuzzies up the details of where reality ended and dream began... Not really invasive, just a little help on the way for the mind's natural tendencies to explain away the impossible...
Feel free to point out if my calculations seem... off.