Fūsatsu Kakei

is a Kidō seal created by Kisuke Urahara specifically for use against Sōsuke Aizen.

Description
A barrier developed by the Shinigami Kisuke Urahara. The seal appears as glowing rings upon the wrist of the opponent. This is accomplished by blocking off the reiatsu vents which are located in the wrists of all Shinigami. This results in the opponent being incineration from the inside out by their own Reiatsu.

Incantation
Unknown, but under the circumstances of its use it appears to have none.

Known Practitioners

 * Kisuke Urahara