Meta Knight pulls out his sword, the Galaxia, and unleashes a strong attack with large range. First, Meta Knight pulls out his cape. If he catches a character, the character will be paralyzed. The screen will then fade to gray, freezing everything. Meta Knight immediately performs his slash, hitting the trapped character(s) and any others who are in range, cancelling out the gray effect.
In later versions after v0.9, Meta Knight says "Know my power." when performing the attack.
If the user attacks quickly enough, they can cancel all the knockback of the move with another attack. considering this is Meta Knight's strongest move, the only good use for this is if the user had taken little to no damage prior to the attack.
On the ground at high percentages the move will glitch and bring you to your standing position, while you fly in the air. This only happens at higher percentages, and is therefore a KO unless a wall blocks you, or you momentum cancel extremely quickly.
Even if a wall blocks you, you'll be stuck on it at "high speed" for at least a full second, giving the Meta Knight user enough time to charge up a smash or rack up damage.