The listing, Disney Infinity Power Disc-Mulan-Dragon Firework Cannon + beauty and Beast(Phillipe) & Wall-E disc has ended.
This Power Disc is based on the Mulan Disney movie. The disc has an image of Mulan and the Dragon Firework cannon. I think Power Disc will unlock the Dragon Firework Cannon as a useable weapon in the Toy Box. This sounds like it will be a lot of fun, and hopefully this will be an over the top, sound effect, streaming firework type of weapon! - See more at: http://www.infinitydisneygame.com/dragon-firework-cannon-power-disc/#sthash.VY4GsIyx.dpuf