Tsuin Kumori.

Name Of Your Style: Tsuin Kumori {Twin Shadow}
How You Learned It: The style was developed in Doki's days in the Kuro Hogosha back when the Emperor was still alive. All of their battles were ambushes conducted under the cover of night and in order to capitalize on this advantage, Doki developed a style of fighting that would further heighten the enemies visual uncertainty. With the enemy having low visibility in the night he learned to clandestinely alter his strikes, defenses and movements in the shadows using his natural ambidextrous rarity.
Ability: The ability allows the user to excel in their natural born ambidexterity. In combat the user is able to switch hands with their blade in order to create surprise offensive and defensive maneuvers.
Drawback: The disadvantage to this style lye's in its time interval between changing hands.