User blog comment:Phoebus18/Who's strongest Dark Mage?/@comment-3424593-20131214220639/@comment-24.45.179.151-20131214230043

Bluenote is on par with Gildarts and Zero was beaten by Natsu, so I'd say that Zero is weaker, however; the only thing that would make Zero better would have to be Genesis Zero, the spell that can reduce a soul into nothing.