A new force has suddenly risen to power in the Great Forest of Jura, and its leader, Clayman, proposes that the Demon Lords hold Walpurgis with the goal of sanctioning the slime who deceived him. Rimuru also begins to prepare for a battle with Clayman, but observing the enemy army's movements reveals that Clayman's target is not Tempest, but Eurazania. Clayman's army will arrive in Eurazania within two days. Can Rimuru's forces get there in time?
It's an event where the 
Demon Lords get together
إنّه حدث يجتمع فيه أسياد الشّيطان
Da treffen sich also die Dämonenkönige und erzählen
bei einem Tee, was so alles Interessantes passiert.
Los Reyes Demonio nos reunimos
para beber té y hablar.
Los Reyes Demonios nos reunimos
para beber té y hablar.
Les rois-démons prennent le thé
I Re demoni si riuniscono davanti ad una tazza di tè 
e si raccontano gli ultimi avvenimenti o storie divertenti.
É um evento onde os Lordes tomam chá e
discutem relatórios urgentes e assuntos divertidos.
Князья Тьмы собираются вместе, пьют чай
и обсуждают всякие интересности — всё.