Sharp Sense

[Divination]
Level: [Nature 1]
Components: [S]
Casting Time: 1 Swift action
Range: Personal
Duration: 1 minute per CL
Saving Throw: None
Spell Resistance: No

Your character picks up on and internalizes the demeanor and capacity of those around them. This allows them to sense their relative HD. They will know if any target within line of site is higher or lower HD than them, and how close they are to death.