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...
A poison bog that damages and 
poisons you when you fall into it!
مستنقع سامّ يضرّك ويسمّمك
!عندما تسقط فيه
Ein giftiger Sumpf, der nicht nur Schaden
zufügt, sondern auch Statusveränderungen!
Un pantano que envenena
y hace daño constante.
Un pantano que envenena
y hace daño periódicamente.
Un marais toxique
qui inflige des dégâts !
Un lago avvelenato che danneggia
e avvelena chi ci cade dentro!
Um pântano venenoso que causa danos
e te envenena quando cai nele!
Ядовитое болото, которое калечит
и лишает сил!