El Escudo

is a Kidō spell. It was the technique used by Sōsuke Aizen to block an attempted sneak attack by Shunsui Kyōraku during the battle over Fake Karakura Town. While both the number and classification of this particular spell is not expressly stated, it most resembles a bakudō (binding) spell.

Description
This technique summons a light green barrier when the user lifts their arm to block an incoming attack.

Incantation
Unknown

Known Practitioners

 * Sōsuke Aizen