uzee said:
Ok, I knew the Daruma game from Kamisama no Iutoori Ni but what is the shadow game?
Kageoni (影鬼, Shadow Demon): The rule of this game is that whoever gets their shadow stepped on "loses".[154] The game itself allows competitors to manipulate shadows to their advantage. For example, Shunsui has demonstrated the ability to hide himself in shadows when using this technique, and he can also control the shadows, using them to attack an opponent by attacking the shadow they are currently standing upon.
btw. that's a cool power - use games as weapons. I wonder what Quincies should do in order to Kyouraku shows his bankai. Loosing another eye would be... cool.