Disclaimer: I know next to nothing about InuYasha! I've been meaning to get around to seeing some episodes, just to see what all the fuss is about, but haven't gotten around to it.
Divine Arrow (Archery Devotion) [Domain]
The power of the gods imbues your arrow with divine might.
Prerequisites: Proficiency with any type of bow, Point Blank Shot, Far Shot, Knowledge (Religion) 6 ranks, must be either Good- or Evil-aligned.
Benefit: Once per day as a swift action you can call upon the power of your deity to imbue your bow with divine power until the end of your turn. If you are good-aligned, shots you make with your bow overcome damage reduction as a good weapon, and deals +1d6 points of holy damage to evil-aligned targets. If you are evil-aligned, shots you make with your bow overcome damage reduction as an evil weapon, and deals +1d6 points of unholy damage to good-aligned targets.
The extra damage you inflict with this feat increases by 1d6 at 5th level, and again every 5 levels after that, to a maximum of +5d6 at 20th level.
When making a shot with Divine Arrow, you gain a +1 sacred (or profane, if evil) bonus on attack rolls with your bow per 4 character levels if your target lies beyond the first range increment of your bow.
Special: You can select this feat multiple times, gaining one additional daily use of this feat each time you take it.
Special: If you have the ability to turn or rebuke undead, you gain one additional daily use of this feat for each four daily turn or rebuke uses you expend.
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As a note, there's a similar feat to yours in the
SRD/XPH.