After being confronted by Yuuto, the Twin Star Exorcists are desperate to get stronger in preparation for future battles, but Benio's old master Subaru has a different kind of training in mind.
which weakens the boundary between worlds.
وذلك يضعف الحدّ الفاصل بين العالمين
y eso debilita el límite entre mundos.
y eso debilita la frontera entre mundos.
il che assottiglia i confini fra i due mondi.
o que enfraquece a barreira 
entre os mundos.
из-за чего граница между мирами слабеет.