Magical tools masters normally can't use magical tools, but Roji realizes that Rio used one to protect Bico. Meanwhile, Muhyo has collapsed after exhausting his ren, leaving him in a dangerous condition of mental numbness... the exact moment Rio has been waiting for.
I released a spirit just strong enough 
to deplete all of Muhyo's ren.
حرّرتُ روحاً قويّة بما يكفي
استنزاف كافة رين موهيو
Ich habe gerade genug Geister freigelassen,
um Muhyos Ren zu erschöpfen.
Liberé un espíritu tan fuerte
como para agotar el ren de Muhyo.
J’ai libéré juste assez d’esprits
pour que Muhyo épuise sa flamme.
Ho liberato uno spirito abbastanza forte
da esaurire tutto il ren di Muhyo.
Eu liberei um espírito forte o bastante
para esgotar toda o ren do Muhyo.
Я выпустила духов, чьих сил
хватило бы для истощения рен Мухё.