Rimuru learns about Clayman and the schemes of the Kingdom of Falmuth, but no matter how hard he wishes for it, his fallen comrades and their peaceful lifestyle will never return. He's just about to give up when Eren tells him of a fairy tale that might offer a glimmer of hope. The probability of success is about 3%... but if Rimuru can manage to become a Demon Lord by taking in the souls of 10,000 humans as nourishment, he just might have a chance at bringing his comrades back to life. As Falmuth's army of 20,000 men marches toward Tempest, Rimuru takes hold of that hope and decides to become a Demon Lord.
That nourishment comes 
from the souls of humans.
وتُستمدّ هذه التغذية من أرواح البشر
Dieser Nährstoff sind menschliche Seelen.
En este caso son almas humanas.
En este caso son almas humanas.
Ces nutriments,
ce sont des âmes humaines.
Tale nutrimento non è altro 
che l'anima degli esseri umani.
O que servirá de nutriente
é a alma de humanos.
Питание — это души людей,
и потребуется их не менее десяти тысяч.