The following pwer replaces the Aura of Misery power of the Suffering domain.
Pleasure from Pain: You gain pleasure from pain. At 8th level you are more resistant to injury since it actually feels good and gain a damage reduction of 1/- which increases by 1 for every 4 levels beyond 8th. At 20th level you are immune to pain effects.
Replacement Domain Powers: 3rd: Excruciating Deformation, 4th: Howling Agony, 9th: Transmute Blood to Acid