From publisher blurb:
Warriors of the Wild is a fantasy d20 product line designed for both players and game masters. It offers well-balanced and thoroughly play-tested classes constructed around various animal, natural, and tribal themes. These classes are perfect for any combat-heavy game, be it in dungeons, cities, the wilderness, or other planes.
This product features the prana filcher, a core class combining good combat capabilities with supernatural powers. Prana filchers are masters of the ancient art of prana manipulation. While they can maintain and restore the health of their allies, prana filchers excel at forcefully draining the life force of their enemies, thus causing them all sorts of pathological symptoms in the midst of battle.