(Active) WIS
  Possessed By: Some Humans, Elves, Deep Gnomes, Wood Elves, Barbarians, Bards, Monks, Rangers, Rogues, Assassins, Earthsingers, Master Archers, Sentinels, Shadowdancers, Tattoo Mystics, Underdark Warriors, Guardian priests.
  Effects:  The Listen skill has the following uses:
   * Hear Hiding Creatures (Passive): The Listen skill can reveal the presence of hiding creatures with an opposed test against the hidden creature's Move Silently skill, as described under Move Silently.
   * Hear Nearby Creatures (Active): The active use of the listen skill can tell a character what kinds of creatures are nearby her based on the noises they make, even if those creatures are behind solid walls or otherwise outside her normal perceptual range.
   * Determine Resting Safety (Active): The Listen skill can also tell a character whether or not it is safe to rest -- by listening carefully, a skilled character can determine if any dangerous creatures are nearby and able to ambush her while she sleeps, or if her rest is certain to be safe.
   This check is made against DC 15, and if it is failed, it may not be attempted again until either the character has rested, or has gained experience three seperate times.