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.
Your ren is basically your mental strength.
الرين هي قوّتك الذهنية
Ren, eine Kraft ähnlich der Willenskraft.
El ren es la fuerza mental.
La flamme fonctionne
comme la sanité d’esprit.
In pratica è la forza mentale.
O seu ren é basicamente sua força mental.
Рен... Так называют силу разума.