Your pact taints your faith while giving undue rewards.
Prerequisites
Fiendish Pact, ability to cast 3rd-level divine spells.
Benefit
When you cast a divine spell, you can spend a use of your Fiendish Pact to increase the caster level by 2. You must declare you are using this ability before the spell is cast.
If the target of the spell is not good-aligned, you may choose to heal it for a number of hit points equal to the level of the spell plus the number of Fiendish Feats you possess. Any excess healing above the target’s maximum hit points is gained as temporary hit points which last for one minute.