Your ability to sense the life force of other creatures is greatly improved.
Prerequisites
Lifesense special ability.
Benefit
Life sources you see glow with double the normal “light.” With this feat, the average Small or Medium living creature gives bright “illumination” out to 40 feet and shadowy “illumination” out to 80 feet.
In addition, any surface a living creature touches leaves a faint glow of life energy which you can now detect, giving you the ability to track living creatures using your lifesense ability. The typical DC for a fresh trail is 10. The DC increases or decreases depending on how large the quarry is, the number of creatures, and the age of the trail. For each hour that the trail is cold, the DC increases by 2. This otherwise follows the rules for tracking using the Natural Lore skill. Creatures tracking by lifesense ignore the effects of surface conditions and poor visibility.