Ninja

a stealth based sub class that hides and kills there pray from the shadows 

hide n stab

jump out and stab your opponent does 1d6 damage  at leavl 3 and 2d6 at level 4 and 3d6 at level 7 and 4d6 at level 10

smoke bomb

drop a smoke bomb to hide in the smoke anything in the smoke is invisible smoke lasts until the round is done

trained killer

have a =5 to attacks coming out of stealth 

knives of death

throw 5 knives at something each doing 1d12 damage range of 20ft