Channel Positive Energy — Damage Undead

Channeling positive energy causes a burst that damages all undead creatures in a 30-foot radius centered on the paladin. The amount of damage inflicted is equal to 1d6 points of damage plus 1d6 points of damage for every two paladin levels beyond 1st (2d6 at 4th, 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 paladin's level + the paladin's Charisma modifier.