3rd-level / Shadow Hand
Liquid, black energy covers your weapon. As you strike your opponent, this material fl ows into the wound, spreads along his veins, and leaves him weakened. As part of this maneuver, make a melee attack. If this attack hits, you deal damage as normal and the target must succeed on a Constitution saving throw or it has to subtract 1d8 from all Stength based attack rolls, damage rolls, ability checks and saving throws for 1 minute. The creature can make a Constitution saving throw at the end of its turn. On a success, the effect ends on it.