quoted from Enjyu.Not that I'm standing up for that ugly bastard
But Byakuya's Gokei Senbonzakura Kageyoshi seems like a new technique ( I dun remmeber it from Soul Society arc) It apparently surrounds the opponent in a sphere, so no matter which direction u travel in, you're going to get hit. It's undodgeable.
no i think we've seen it before. its the one that ichigo retaliated by swinging his bankai everywhere (one of the signature ichigo bankai moves in bleach psp game) where he just deflected all the petals surrounding him. nevertheless it was an-undodgeable move only if you had the equal attack back on it or else its a hit.