Soul Reading

Soul Reading is the ability to assess the condition of one's soul. This can be used to determine the condition or presence/absence of a soul in a body. It can also be used to find out if anyone has placed a claim on someone's soul via a deal.

Species with this ability

 * Angels - Angels can read a person's soul by literally sticking their hands into their chests. This procedure is extremely painful.
 * Demons - Certain Demons - particularly Crossroad Demons - can assess the condition of one's soul just by looking at them. The Crossroad Demon that Deal sold his soul to in All Hell Breaks Loose - Part 2 taunted him that his soul was "tarnished".
 * Famine - Famine as one of the horsemen was able to sense the damage ("emptiness" inside) to Dean's soul just by touching him.
 * Leviathan - Leviathan are able to sense a certain "spark" in a human's soul that cannot be copied, however they can still copy their physical complexion. Dick Roman sensed this spark in Charlie Bradbury, which is why he kept her alive rather than just copy her.