[quote=@Lunarlors34]
<Snipped quote by Oblivion666>

Tokyo ghoul? What does that have to do with anything?
[/quote]

They rate the power of ghouls much like fairy tail, except after S rank they have S~, SS, SS~, SSS, SSS~. So a joke saying that he ascended above the S rank. That and I never seen a mage have a specific SS rank, Wizard Saint I feel would be the next step up after S rank.