User blog comment:SpookyBoogie27/Light Novel Spoilers/@comment-4823600-20130209152029/@comment-6253635-20130209170716

Yes my friend i knw that by double i meant in future maybe he will use two powers that are polar opposite to each other.Beside Azazel gave a theory but we know that if its issei than he can come up with weird way to grow up.Albion didnot even know that his power can be stolen like that.He can definately be able to use it as sub species because Kiba also have two polar opposite sacred gear in him.