Channel Negative Energy

An evil cleric (or a neutral cleric who worships an evil deity) channels negative energy and can choose to deal damage to living creatures or to heal undead creatures. Channeling energy causes a burst that either heals all undead creatures or damages all living creatures in a 30-foot radius centered on the cleric. The amount of damage dealt or healed is equal to 1d6 points of damage plus 1d6 points of damage for every two cleric levels beyond 1st (2d6 at 3rd, 3d6 at 5th, and so on). Creatures that take damage from channeled energy receive a Will save to halve the damage. The DC of this save is equal to 10 + 1/2 the cleric's level + the cleric's Charisma modifier. Creatures healed by channel energy cannot exceed their maximum hit point total—all excess healing is lost. A cleric may channel energy a number of times per day equal to 3 + her Charisma modifier. This is a standard action that does not provoke an attack of opportunity. A cleric can choose whether or not to include herself in this effect. An evil cleric (or a neutral cleric of an evil deity) can also channel stored spell energy into wounding spells that she did not prepare ahead of time. The cleric can "lose" any prepared spell that is not an orison or domain spell in order to cast any inflict spell of the same spell level (an inlict spell is any spell with "inflict" in its name).