Commands : Co1,Co2,Bo3,H1-4,F1-2,C1-2 and can be use by male and female __________________________________________________________ Cero Oscuro (Japanese for "black hollow flash", Spanish for "Dark Zero") is a black Cero, used only by an Espada in their released form. So far, Ulquiorra Schiffer is the only arrancar to utilize this attack. He compares it to Ichigo's black Getsuga Tenshō. It covers any exposed light into pitch darkness.Though the only Espada shown to utilize this technique so far, Ulquiorra told Ichigo "This is an Espada's fully powered Black Cero." This likely means that, similar to Gran Ray Cero, Cero Oscuro is an Espada specific attack. However it is too early to tell for sure, because only Gran Rey Cero coupled with any Espada above Cuatro releasing their power are forbidden under Las Noches. Obviously Cero Oscuro should be forbidden as well, since an Espada ranked below 4th (perhaps Nnoitra) should be able to use Cero Oscuras after his/her ressureccion under Las Noches. Ulquiorra also referred to it as "my cero." The Cero Oscuro's range is vast, and its attack power is unknown, though it is powerful enough to shatter Ichigo Kurosaki's Hollow mask, critically injuring him in the process, and strong enough to destroy 1/3 of the dome over Las Noches. The superior Cero Oscuro is far greater than a average Cero.