Last summer, I read a book about the black death. Since then, I've been fascinated by the flagellants. I'm building a new campaign world called Oubliette. Here's two feats for followers of Cruciar, Lord of Pain and Guardian of the Flesh.
Flagellant
You are a flagellant of Cruciar. By flaying your skin, you force the Captive's corrupting taint out of your flesh. Your blood runs from your wounds, carrying away the sin that formed the world and eats at its heart.
Benefit: As a swift action, you may use a flail, whip, or scourge to injure yourself. Roll damage as normal for an attack. In return, you gain DR 5/-, a +4 bonus on Will saves, and +1d6 damage on melee attacks (+2d6 damage v. aberrations). You cannot use this feat if you are under the effects of fast healing, have regeneration, gain DR versus the attack against yourself, or have received healing in the past round. You may choose to cancel your DR against your attack in order to activate this feat.
The benefits of this feat last until the start of your next turn.
Cruciar's Wrath
You invoke the name of Cruciar, calling his dread eye towards you. Wounds spontaneously burst on your body as his holy energies purge your body of sin as they aid you in battle.
Benefit: As a swift action, spend a turning attempt and suffer 1d6 points of damage to activate this ability. You gain a bonus equal to 1 + your Charisma bonus on melee damage and Will saves for 5 + your Charisma modifier rounds.
Cruciar
Lawful Neutral
Lord of Pain, Guardian of the Flesh, The Cleansing Wound
Enemies: The Captive, aberrations
Affiliation: Young God
Holy Symbol: Triple flail
Domains: Death, Destruction, War
Favored Weapons: Flails, whip, scourge