Fire Release: Heavenly Prison

An used by Mui's clan. The ones who are subjected to this technique have a formula applied to them, they can no longer use chakra. Mui uses this technique on the prisoners of Hōzukijō. If the prisoner were to leave or forcefully draw chakra, the technique causes them to burst into flames, killing them. The seal will disappear if the user dies.

However this technique only suppresses normal chakra. When enhanced with natural energy, one is still able to use chakra.