The following is a talent with which I've been toying around. Suggestions are welcome.
New talent: Deadly Strikes (alternate name: Stabby McStab-Stab)
Prerequisites: Focus: Dexterity (Light Blades)
Class: Rogue
The following abilities are gained when using a dagger/main gauche.
Novice: The rogue can reroll damage against an unaware target. The damage from the second roll must be kept. An unaware target is one that is not already considered to be in combat, so this would not factor with bluff.
Journeyman: The stunt Lethal Blow costs 4 stunt points instead of 5.
Master: The rogue may add his/her cunning score to the damage roll.


