Shuriken of Light
When activated, the Mii Swordfighter will toss a small, translucent yellow shuriken forward in a line, similar to Greninja's Water Shuriken, but with light instead of water. The shuriken damages the first enemy it hits, then disappears. It is stronger when hitting from a distance, doing 9% damage, while at close range it deals only 2% damage. Additionally, when used up close, it will only shift the enemy backwards slightly without making them flinch at all (giving it some similarities to Fox's Blaster or the Mii Gunner's Laser Blaze), while when fired from a distance, it can make them flinch. It should be noted that the Mii Swordfighter gains super armor at the moment that they flash. While not useful in most situations, it can be used with precise timing to avoid knockback from otherwise deadly incoming attacks.
In Ultimate, the shurikens now pick up speed as they travel, are thrown much faster overall, and have gained the ability to lock opponents. However, the projectile now deals less damage upon reaching its maximum distance.
Special Move customization was added in Super Smash Bros. 4. These are the variations: