User blog comment:Merkarion/Original Maous and their Legacy/@comment-37165251-20181215171702/@comment-33341107-20181216214720

I think that the Lucifer clan trait could be related to light since his name means morning star. I get people were pretty amazed when Yuuto got his balance breaker but part of that amazment could be from the fact that a low class devil was able to fuse light and darkness, while Lucifer was the head of the devils also Yuuto pulled it off with a sacred gear, so its a weapon of god using both his own and his enemies strengths. If it isn't light based I think it will be something relatively unimportant, like taking the demonic power of other devils and adding it to his own. I've always been curious why Lucifer was the leader, devils, or atleast purebloods respect power so he was probably stronger than the rest but if he had an ability that let him take their strength then his position as leader would be unquestioned. I also think this would be a reason we haven't seen it play a role in the story, I don't think Vali has fought any devils so far except Issei who has vertually no demonic power, and Rizevim who would have the same power so it would be pointless.