slaughterj said:
That may well be, but how would the object have this information if it is no longer in the person's possession and therefore could not have obtained that information? The item is no longer in their possession, and so it wouldn't be able to leave psychic impressions any more. One might be interested in that information, but one might also be interested in that person's enemies and where they can be located as well, but the object isn't giving that up just because you're interested...
The flavor-text speaks of (pg. 206) Khitanian soldiers using the skill on a patch of bloody sand to discern vague info about a missing king. The spell text also specifically mentions using body parts. I'd imagine this could range from hair, finger/toe nails and blood to severed fingers and limbs.
The rules for Magical Links (pg. 198 and descriptive text pg. 197) describe the connection between the soul and the body and how the connection remains, albiet weakened, in severed or lost parts, even ones as mundane as hair and nail trimmings.
It seems like they're working around the assumption of a similar link or bond between a person and an item that they possess. The link is much weaker and instead of being able to harm the person you can only get information.
Here's how I would do it. Remember that I'm not an official rep. This is just my take on it.
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In preparation for a raid, an Aquilonian soldier is issued a new quiver of arrows. Within several days, he and his comrades are raiding in Nemedia. A Nemedian scholar pulls one of the soldier's arrows from the dead body of a Nemedian General. He attempts the Psychometry spell, but the arrow was only in the soldier's possession for a few days. The 'impressions' are confused by those left by the fletcher who created it and the general it killed. At best, he can determine that the slayer was probably an Aquilonian and probably a soldier.
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Near the dead general, the scholar finds a broken poniard with a carved wooden hilt. The weapon was dropped by an Aquilonian soldier. He had carried the weapon for years and carved the hilt himself. As the soldiers returned to Aquilonia, the soldier lamented the loss of his lucky dagger. Many times he would reach for the missing dagger or notice that his weapon belt felt awkward without it.
The scholar attempts Psychometry again and is rewarded for his efforts. The link between object and owner was very strong and he was able, with great effort, to discern information about the bearer's location and condition.
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slaughterj said:
[Setting aside any issues with the discussion being about a "fantasy" ability...]
I'm not sure what you mean. Psychometry is a 'real world' skill associated with psychic phenomena. No one has proved anything of course, but there have been some interesting tests done. Also the way the spell is described in the game and the rules for magical links both have 'real world' precedents in ancient magical beliefs and traditions.