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.
but if it's only for the 
short lifespan of a human,
،لكن إذا كان هذا لأجل حياتي القصيرة كبشريّة
Auch wenn es nur die kurze
Lebenszeit eines Menschen ist,
pero la vida humana es corta.
pero la vida humana es corta.
ça ne me dérangerait pas de m’enchaîner
le court temps d’une vie humaine.
Visto quanto è breve la vita di un umano,
não me oponho a ficar restrita
Но уж на одну человеческую жизнь…