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.
I'm going to do everything I 
can to increase my chances.
سأفعل المستحيل لتعزيز فرصي
Aber ich will alles tun,
um die Wahrscheinlichkeit zu erhöhen.
E voglio fare tutto ciò che è in mio potere
per aumentare le probabilità di successo.
Farei de tudo pra aumentar
as chances de sucesso.
Но я сделаю всё, чтобы 
воплотить его в реальность.