In order to come to terms with his own negligence and revive Shion, Gobta, and his other fallen comrades, Rimuru reveals that he used to be a human. But his allies think nothing of it and accept him regardless, as if it's the natural thing to do. Filled with gratitude for the warm, accepting environment he's in, Rimuru turns his focus to the army from Falmuth. He entrusts Benimaru and the others to destroy the devices that are generating the enemy's Prison Field while Rimuru himself sets out to attack the advancing army and use them as nourishment to become a Demon Lord.
is a necessary part of the 
process to become a Demon Lord.
هو جزءٌ ضروريّ من العمليّة لأصبح سيّد شيطان
ist notwendig, damit ich
ein Dämonenkönig werde.
es un proceso necesario
para que se cumpla.
es un proceso necesario
para que se cumpla.
que j’extermine les envahisseurs
par moi-même.
è un processo necessario per fare di me un Re demone.
também é um requisito
deste mesmo processo.
обязательное условие
при обращении в него.