Deft Strike

An swordlord can add his Dexterity bonus (if any) to damage rolls made with a dueling sword instead of his Strength bonus. This bonus on damage rolls applies whether the swordlord is wielding a dueling sword one-handed or two-handed. An swordlord cannot use this ability if he is wielding a shield or using an off-hand weapon (including armor spikes, unarmed strikes, or natural weapons).