. . . "Since Shinshu got the scroll from Akio's weapon vault it is exactly like Akio's scroll.Shinshu does not have to open the scroll to bend sand out.Since his elements are fire and wind he can removed the water from his scroll by drying it out and put out the fire.The only way to make it so Shinshu cant use his sand is to destroy the scroll the scroll or use an element other than fire and wind." . .