Gran Rey Cero

is a variation of the Cero technique used by the Espada as well as by Ichigo Kurosaki.

Description
By mixing their own blood with a Cero, an Espada can fire a Cero with much greater attack power and speed, in addition to having a change of color unique to them. It is many times more powerful than a normal Cero, disturbing the fabric of space as it travels. Upon release, it spins like a razor as it compresses and decompresses due to the sheer speed and raw power. Ulquiorra Cifer states using a Gran Rey Cero is one of two things forbidden while inside Las Noches, for it is so overwhelming it could destroy the fortress.