Now, this is a knife!

Considering an optional rule for characters with a knife fighter character concept. Knife fighting skill is military and only open to someone with that PSA. A character with this skill is adept at small blades. They do their skill level divided by two rounded up in d10 of damage with a knife in melee. When throwing a knife they have a rate of fire of their skill level divided by two rounded up. While unobserved and from behind they make make a lethal strike at their skill check level but the side are modified by 1/2 the INT of the target (target gets RS check for 1/2 damage). In addition the knife fighter does maximum damage (no rolling) if he gets a critical success like the martial artists nerve combat rule. I toyed with the idea of a whole series of knife wielding specialabilities much like the cinematic martial arts but decided against it as being too d20 ish feat system like.