This article, Steel Release: Cage, is the sole property of Gen Nakaido24 and as such, his express permission is required to modify or reference it in any way.
After forming the needed hand signals, the user creates an iron cage around an opponent. It uses the user's chakra to channel strength into it. The chakra fed into the structure of the cage slowly repairs any damage dealt to it, but it also causes significant drain on the user. Depending on the level of the user and the direction of the chakra flow, the cage can be broken out of with a powerful-enough strike towards a weakpoint.