First thing i have to say-This is not going to be a copy of the assassin or Naruto.
Primary-Evasion
For every point you have in this attribute, you have a + 1% chance to evade attacks. Also,many Ninja skils dealing with taking less damage are increased with Evasion.
Nunchuck Mastery
Increases the damage you do with Nunchucks. Also, many skills that use Nunchucks to deal damage are increased with Nunchuck Mastery.
Shuriken Mastery
Increases the damage dealt with Shurikens. Also, many skills that use Shurikens to deal damage become better with Shuriken Mastery.
Sneaking
Many skills that deal with cloaking and smaller aggrovation area are increased with Sneaking.
S

the nunchuck idea doesnt sound too good IMO, but shuriken is a cool concept for GW. I was kinda Dissd with the assasin from factions, so a ninjalike touch would be cool. Arent nunchucks more for showing off anyway?