Warning: This is 3.0 Edition material. It is possible that there is more recent 3.5 Edition version.
Inaccurate?

Bladebane

(Unapproachable East)

Transmutation
Level: Paladin 2, Cleric 3, Sorcerer 4, Wizard 4,
Components: V, S, M,
Casting Time: 1 standard action
Range: Touch
Target: Weapon touched
Duration: 1 round/level
Saving Throw: Will negates (harmless, object)
Spell Resistance: Yes (harmless, object)

You impart a deadly quality to a single bladed weapon (any slashing weapon) for a short time.
Bladebane confers the bane ability on the weapon touched, against a creature type (and subtype, if necessary) of your choice.
The weapon's enhancement bonus increases by +2 against the appropriate creature type, and it deals +2d6 points of bonus damage to those creatures.
Material Component: A drop of blood and ruby dust worth 500 gp.