Fūsatsu Kakei (封殺火刑, Seal Slaying-Fire Penance)[1] is a Kidō seal created by Kisuke Urahara specifically for use against Sōsuke Aizen.
Description[]
Appearing as glowing yellow-golden rings around the wrists of the opponent, this spell blocks off the Reiatsu vents located in the wrists of all Shinigami, resulting in the opponent being incinerated from the inside out by their own Reiatsu.[2]
Incantation[]
Unknown.