Gran Rey Cero

Gran Rey Cero|王虚の閃光 (グラン・レイ・セロ)|guran rei sero| Spanish for "Grand King Zero", Japanese for "Royal Hollow Flash"}}: is a Arrancar variation of the Cero technique. It is used by the Espada.

Definition
Is a Cero that only Espada are capable of using. It is performed by mixing an Espada's own blood with the Cero. The result is a Cero with a much greater attack power and speed as well as a change of color unique to the Espada. It is also many times more powerful than a normal Cero, capable of disturbing the fabric of space, it also seems to spin like a razor upon release as it compresses and decompresses due to the sheer speed and raw power. It is stated by Ulquiorra that using a Gran Rey Cero is one of two things that are forbidden while inside Las Noches, as it is so overwhelming that it could destroy the fortress.