“When the owner of the four-leaf grimoire is filled with despair, the five-leaf clover grimoire will be born.” Patry is filled with despair after learning he had been manipulated by the devil all this time and turns into a dark elf. He then starts attacking Yuno and Asta, fueled by nothing but hatred and malice. Somehow, becoming a dark elf had made Patry even stronger, which gives Yuno and Asta an even harder time fighting him. Then Captain Nozel appears before them. Nozel happens to have the best magical attribute to fight against light magic, mercury magic.
and locked yourself up in darkness 
because it's easier that way!
!وحبست نفسك في الظلام لأنّ ذلك أسهل بكثير
Ist es denn wirklich einfacher,
allein im Dunkeln eingesperrt zu sein?
Claro, es más fácil
encerrarse a oscuras.
Claro, es más fácil
encerrarse a oscuras.
en te cantonnant dans les ténèbres
et en te voilant la face !
e ti sei rinchiuso nell'oscurità, 
perché così è tutto più semplice!
e se trancafiou na escuridão
porque assim é mais fácil!
Ну ещё бы,
запереться во тьме-то всегда проще!