Bladebane

Bladebane was a transmutation spell that caused a bladed weapon to be temporarily more harmful to a specific type of creature.

Effect
By use of this spell, the caster imparted a deadly quality to a single bladed weapon for a short time. Bladebane conferred the bane property upon the weapon touched, focused against a type of being of the caster's choosing. The enhanced weapon struck these creatures more often, and inflicted more damage upon them.

Casting
In addition to verbal and somatic components, this spell required a drop of blood and an amount of ruby dust worth at least 500 gp.