After defeating Clayman at Walpurgis, Rimuru officially became a Demon Lord and a member of Octagram. Meanwhile Diablo awaits Rimuru's return in Tempest, and is anxious to learn about his master's activities as soon as possible. A look back at Walpurgis.
The day on which the Demon Lords gather was 
named "Walpurgis" by the Western Holy Church.
"اليوم الّذي يجتمع فيه أسيادُ الشّيطان سُمِّي "والبورغيس
بواسطة الكنيسة المُقدّسة الغربيّة
Die Westliche Heilige Kirche
hat solchen Tagen
La Iglesia Occidental
nombró Walpurgis al día de la reunión.
La Iglesia Occidental
nombró Walpurgis al día de la reunión.
Le jour même du banquet,
È stato il Sacro concilio dell'ovest
O dia em que os Lordes se reúnem foi chamado
de "Walpurgis" pela Igreja Sagrada Ocidental.
Насколько мне известно,