User blog comment:Dragon´s Blade/World Coexistence Alliance/@comment-24376783-20150121112559/@comment-24376783-20150121130845

Rex started his explanation to reveal that Leo had known from the moment Jason was born how he would turn out. The same went for Viola, which, by then, he knew that having children the normal way would be no good. He started to use his power over matter to construct Rex out of his and V's energy. He modified the DNA so that he could ensure that Rex didn't turn out like his siblings. He also removed any way of Rex failing and becoming a Link-Joker. The reason he didn't try to defend himself from being called a monster was because, in his mind, he was one. One that needed to be exterminated.