Rimuru is building a dungeon in preparation for the upcoming festival. It will feature treasure chests containing weapons made by Kurobe, and Veldora will inhabit the deepest floor as the final boss. Then Milim suddenly shows up with a suggestion...
I can make pretty much anything 
happen in my own labyrinth.
يمكنني صنع أيّ شيء تقريباً في متاهتي
In meinem Labyrinth
kann ich fast alles beeinflussen.
Dentro de mi laberinto
puedo conseguir casi de todo.
Dentro de mi laberinto
puedo conseguir casi de todo.
Dans mon labyrinthe,
j’ai à peu près tout et n’importe quoi.
È il mio labirinto,
posso farci praticamente di tutto!
Posso fazer praticamente qualquer coisa
acontecer no meu próprio labirinto.
У меня в лабиринте
можно устроить почти всё что угодно!