Rimuru backs Clayman into a corner trying to get him to reveal who he's working for, but even on death's door, Clayman's lips are sealed. Left with no other choice, Rimuru finishes Clayman off. With Clayman dead and Carrion and Frey announcing that they're stepping down as Demon Lords, the total number of Demon Lords including Rimuru is reduced from ten to eight. Guy coerces Rimuru into coming up with a new name for their group, and Rimuru's solution is "Octagram," representing each of the Demon Lords as an eight-pointed star. Thus a slime became one of the eight Demon Lords, marking the start of a new age.
the Ten Great Demon Lords are now 
the Eight Great Demon Lords, right?
أسياد الشّيطان العظماء العشرة صاروا
أسياد الشّيطان العظماء الثّمانية، صحيح؟
dass es nicht mehr die zehn großen
Dämonenkönige sind, sondern nur noch acht.
non siamo più i Dieci Grandi Re demoni, siamo in otto.
os Dez Grandes Lordes Demônios
agora são apenas oito, não é?
От Десяти великих Князей
осталось только восемь?