Strength Draining Strike

(Tome of Battle: The Book of Nine Swords, page 80, DnD 3.5)

Shadow Hand (Strike)

Level: ; Swordsage 3
Prerequisite: One Shadow Hand maneuver
Casting Time: 1 standard action
Range: Melee attack
Target: One creature
Saving Throw: Fortitude half

Liquid, black energy covers your weapon. As you strike your opponent, this material flows into the wound, spreads along his veins, and leaves him weakened.

As part of this maneuver, you make a single melee attack against an opponent. In addition to dealing normal melee damage with the attack, you deal 4 points of Strength damage. A successful Fortitude save (DC 13 + your Wis modifier) halves this Strength damage, but has no effect on the normal melee
damage you deal with the strike.

This maneuver is a supernatural ability.