Dungeons & Dragons 3.5 Feat: Aligned Devotion

Your healing powers are only effective for those whose alignment closely matches yours.

Ability to spontaneously cast cure spells.

Your spells of the healing subschool have reduced effect on those who do not share your alignment. Those that have exactly the same alignment as you gain full benefit from your healing. Those with an alignment within one step of yours are cured half the normal amount of hit points from your healing spells. Characters with alignments more than one step different from yours gain no benefit from your healing at all. Your cure spells still deal full damage to undead.