Animenewsnetwork - True ninja cinema understands the deadliness of shuriken. Ninja Slayer From Animation authors Bradley Bond and Philip Ninj@ Morzez understand true ninja cinema's understanding of the deadliness of shuriken. And Trigger, as is clearly demonstrated in this episode, understand Bond and Moretz' understanding of true ninja cinema's depiction of shuriken. Shuriken, sometimes known as “ninja stars,” are so dangerous that they are banned by law in the state of California. These prized and ancient weapons are, in fact, so deadly that they were historically very rarely used as a killing weapon at all, because let's face it, how the hell are you actually going to kill someone by throwing a tiny bladed wheel at them?