Shuriken (also known as throwing stars) are martial, ranged weapons consisting of several sharp blades set in a circular pattern that deal 1d4 damage on a hit and have the Finesse, Light and Thrown properties.

Finesse
When making an attack with a finesse weapon, you use your choice of your Strength or Dexterity modifier for the attack and damage rolls. You must use the same modifier for both rolls.

Light
When you take the Attack action and attack with a Light melee weapon that you’re holding in one hand, you can use a bonus action to attack with a different Light melee weapon that you’re holding in the other hand. You don’t add your ability modifier to the damage of the bonus attack, unless that modifier is negative. If either weapon also has the Thrown property, you can throw the weapon instead of making a melee attack with it.

Thrown (20/60)
If a weapon has the thrown property, you can throw the weapon to make a ranged attack. If the weapon is a melee weapon, you use the same ability modifier for that attack roll and damage roll that you would use for a melee attack with the weapon.

Superior Strike

Battery Strike.
With incredible dexterity and speed, you hurl numerous weapons at once. Make a number of ranged weapon attacks equal to 1 plus half your proficiency bonus (rounded down) against targets within the normal range of your weapon. Each attack must be against a different object or creature. You must have available weapons that have this superior strike option on your person with which to make these attacks.