Luckily, unlocking the Throwing Star (aka Shuriken) in Warzone 2 is fairly straightforward, though you may need to be a little patient. You see, to get it you’ll need to rack up 50 Throwing Knife ...

Fire Shuriken is a Ninjutsu in Nioh 3 that can be acquired very early on in the game. Here is its location.

Engrave your belt with the Shuriken Toss rune: Throw a shuriken at your enemy dealing damage equal to 25% of your Attack Power, and also strike up to 4 additional nearby targets. Awards 1 combo point.