“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.
He always seemed cold, but he 
is the Captain of the Silver Eagles.
.لطالما بدا شخصًا باردًا، لكنّه قائد النسور الفضية
Ich dachte,
er habe eine kühle Persönlichkeit,
Parece una persona fría, pero
es el capitán de las Águilas Plateadas.
Aunque parece una persona fría,
es el capitán de las Águilas Plateadas.
Il est peut-être froid,
Mi è sempre sembrato un uomo così freddo... 
ma rimane pur sempre il comandante dell'Aquila d'Argento.
Ele sempre pareceu frio, mas é
o capitão dos Águias de Prata.