nacht maybe (. - .)

me

But there is a flaw in that theory, the timeline.

You see, Asta and Yuno where aboned in the church at the same time. And Yuno was aboned because his kindom feel to the Dark Triads that used the demons' powers. However, in chp 268 Asta's mother died defending lil demon Liebe from Lucifero. Lucifero claimed that he was looking for a way to manifest himself in that word. By that time in chp 268 Yuno and Aster where already growing in the church, so the Dark Triad had already won over the Spade Kingdom, so why would he need to do that if he already made a contract with the Dark Triad?
So either there is a mistake in th theory or Lucifero was searching for a way to manifest himself in the human world without the help of the Dark Triad.