User blog comment:Raababukk/Possible New Power ups for Issei Hyoudou/@comment-24248485-20131229205333/@comment-1359322-20131230011131

Otaku, how many times do you need people to explain to you that Super Devils are Mutation of Devils, they have abilities that surpass that of the normal Devil.

Sirzechs mastered his POD to the point he could literally annihilate anything and mutated into a human-shaped POD. Ajuka specialized his demonic powers into equation and gained the ability which what others would say to be the "Ultimate Technique". In Rizevim's case, he might just specialized his Demonic powers into nullifying attacks and the Sacred Gear Canceller is only one of his many skills.