The council's rampage sends quakes through the demon realm, and the demon Chaos is called forth through a giant magic circle. That commander of all heroic spirits flails madly, seeking to claim Basara, Mio, and Leohart's lives. Do they even stand a chance of victory with this supreme being before them?!
Meanwhile, Maria, Yuki, and the others put a final end to their own personal battle.
"Believe in me... once more."
The ultimate sibling combo risks their lives to face the disaster striking all of the demon realm!
Even if we proposed peace by 
offering up Belphegor's head,
Selbst wenn wir mit Belphegors Kopf
ein Friedensangebot gebracht hätten,
Aunque hubiésemos propuesto la 
paz con la cabeza de Belphegor,
Aunque hubiésemos propuesto 
la paz con la cabeza de Belphegor,
Même si on avait proposé une trêve
après la mort de Belphégor,
Se avessimo proposto la pace
 offrendo loro la testa di Belphegor,
Mesmo propondo um tratado de paz
 ao oferecer a cabeça de Belphegor,
Даже если предложить голову Бельфегора 
в знак перемирия,