Descrying

Descrying is an elven ability that allows him to see the aura of any creature and determine if the creature is host to an elemental essence. An elf could identify a particular elemental by the color of the aura. This is an innate ability that all elves have, regardless of their caste or sub-race. Because of the magical nature of the Klah'hin, elves can also determine if someone is in posession of an avatar spirit, but are unable to tell the diifference between them.

Because elves are created partly from magic, this ability was discovered when the gates to the Nexus was breached. It is likely that once the gates are permanently closed, they will lose this ability as there will no longer be a reason to see essence.