Ambition

 is the special superpower granted by the Green Samurai Miraculous to its owner.

Description
This superpower allows the user to surround themselves and their mask with dark-like aura and move around darkness. Examples of movement would be sneaking into darkened areas and sneaking in shadows for an attack from behind.

Miraculous owner
When the Green Samurai Miraculous places their hands behind the back of their heads to mimic them tightening their mask, it engulfs a shadowy-like aura all around their body and around their mask, in which they begin to utilize their own spiritual energy. They also look for darkened areas to phase through and use that darkness to sneak/teleport their way into another area to find a blind spot so the foe doesn't see them. They can move into a variety of things including very dark areas and move through shadows, including people's very own shadow as a movement.

They can also trap the foes shadow in place to hold them in place while being unknowingly to them.

Trivia

 * This superpower was the direct inspiration to Roronoa Zoro's Armament Haki Mode ability from the One Piece series.
 * This superpower is also capable of enhancing all four swords in the process the user is wielding.