User blog comment:Stark373/Was Ulquiorra the most powerfull Espada?/@comment-44061-20091123020517/@comment-5422468-20120818142906

well technically only ichigo, inoue, and ishida have seen his sergunda etapa, and ichigo's uncontrolled form can destroy hell (as seen in hell chapter) therefore it is possible that he is in fact the strongest espada as having survived a point blank cero from that form (even without giving up high speed regeneration for speed)