Board Thread:Questions and Answers/@comment-11531213-20130704112131/@comment-7501423-20130915192944

Also none of the Murakumo units nor Kusanagi can cause darkness to surround their foes. Izayoi is just a prototype and therefore has similarities and differences, also if Tubaki does become Izayoi, I doubt multiple blades will be at her command, looking at the character profile of her in that state.