Channel Positive Energy

A good cleric (or a neutral cleric who worships a good deity) channels positive energy and can choose to deal damage to undead creatures or to heal living creatures. Channeling energy causes a burst that either heals all living creatures or damages all undead 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. A good cleric (or a neutral cleric of a good deity) can also channel stored spell energy into healing 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 cure spell of the same spell level or lower (a cure spell is any spell with "cure" in its name).