“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.
the one that gave 
Captain Yami all that trouble.
.إنّها التعويذة التي سببت المتاعب للقائد يامي
die, gegen die selbst
Ordensführer Yami Probleme hatte.
Incluso el capitán Yami
tuvo problemas con él.
Incluso el capitán Yami
tuvo problemas con él.
celui contre lequel
le capitaine Yami a galéré.
È lo stesso che ha dato 
al comandante Yami così tanto filo da torcere...
Foi ele que causou todo aquele
problema ao Capitão Yami...
Даже капитан его едва пережил!