Heavens Library & Crimson Lord brings back Arata, Lilith and the rest of the Trinity Seven to face off against the greatest enemy in the history of the Trinity Seven; Lilith’s own father, who is revealed to be the strongest Demon Lord who challenges Arata who is now a Demon Lord candidate.
It's just part of the alternate 
world Demon Lord's power.
.إنه جزءٌ من قوّة الملك الشيطانيّ من العالم البديل وحسب
Das ist nur ein Teil der Macht
des Teufels aus der anderen Welt.
Es parte del poder del rey demonio
del otro mundo.
Es parte del poder del rey demonio
del otro mundo.
Fa parte dei poteri del Signore dei Demoni 
della dimensione alternativa.
É apenas uma parte do poder do
Lorde Demônio do mundo alternativo.