Blurring Blade (ブレードフラリー, Blade Flurry), known as Blade Flurry in the PAL version, is one of three neutral special moves for the Mii Swordfighter. When used, it begins charging, then unleashes a series of stabs before knocking the enemy back with a final lunge. The charging animation and finishing blow are similar to Marth and Lucina's Shield Breaker, while the multi-hit portion of the attack resembles the fourth downward strike of Dancing Blade.
In Super Smash Bros. Ultimate, the Blurring Blade move returns and was significantly buffed. It now sets the Swordfighter's blade aflame for its duration, deals flame damage, and ends in an upwards slash, instead of an outwards thrust, creating a larger hitbox. This move has also been given higher knockback, giving the Swordfighter access to extremely early KOs, and the ability to be reversed, just in case an opponent rolls behind the Swordfighter.
Special Move customization was added in Super Smash Bros. 4. These are the variations: