Shuriken

Shuriken (a.k.a. "Purple Shuriken", "Throwing Star") is a recurring Ninjutsu in the Ninja Gaiden games. It is the most basic Ninjutsu, typically ineffective and with low-Ninpo cost. It travels forward in a straight line. It does not make an appearance in Ninja Gaiden 3, most likely due to its lack of practical use.