He manipulates shadow energy. Weapons, portals, that clone that follows him around. He can make more of them as well.

[He frowns. He shouldn't be describing Bi-Han as having shadow powers. That's not the future they should have had. Kuai will forever regret he wasn't there when Hanzo beheaded Quan-Chi, the man responsible for turning Bi-Han into... whatever he was now.]

They look like shadows, but they're deadly. Stay wary lest he surround you.