It's an amusing idea, but you wouldn't need another attribute line or even new items in game. Just make them skills.
Examples:
Star Strike - 5 en, no cast time, 5 rchg - Deadly Arts
Skill. Throw a shruiken at target foe dealing 5..25 damage if it hits.
Star Storm - 10 en, 3/4 second cast, 20 recharge - Deadly Arts
Skill. Throw shruiken at target foe and up to 3 foes adjacent to your target, dealing 5..25 damage if they hit. Only one shruiken will strike any one foe.
Poisoned Star Strike - 10 en, no cast time, 10 rchg - Deadly Arts
Skill. Throw a poisoned shruiken at target foe, dealing 5..25 damage and poisoning foe for 3..9 seconds if it hits.
Barbed Star Strike - 10 en, no cast time, 10 rchg - Deadly Arts
Skill. Throw a barbed shruiken at target foe, dealing 5..25 damage and causing bleeding for 3..9 seconds if it hits.
Between The Eyes - 15 en, 1/4 second cast time, 30 rechg - Deadly Arts
Elite Skill. Throw a shruiken which cannot be "blocked" or "evaded" which deals 5..25 dmg and which interrupts target foe's action. If that action was a Spell, target foe is Dazed for 3..9 seconds.

Skills like these would be a great reason to buy chapter 3.