Rin is intent on wiping out the demons, but without a plan, it'd be too easy for some to escape. With that in mind, Ysley contacts another Idaten named Prontea to formulate a strategy, while the demons begin their own divide-and-conquer campaign against their divine enemies.
it'll be hard to ensure 
all the demons are dead.
فسيكون من الصّعب ضمان موت كافّة الشياطين
sarebbe difficile assicurarsi
che tutti i demoni siano morti.
vai ser difícil saber se todos
os demônios morreram.