For everyone wondering why the S-rank monsters are able to breath in the shadow prison, they're zombies they don't need to breath.
In the last chapter (page 16) Crouch calls them Zombie Soldiers.
@codydub03 I think it's more to test the elf, to see if she can be trusted. Their main priority is to save the spirit girl whether the elf lives or dies doesn't matter, but since she's the contractor of the spirit they can't kill her without a reason. Also he did think "the best option is to...
@Scarifar but on page 12 his thought bubble literally says " well, i just want to experience what Rygaard went through". i'm sorry but for some reason this one thing really bothers me.
Can someone please explain the logic in this. The MC chose the job of ditch cleaning to experience what the great warrior Rygaard went through right? So why the F**K did he use cleaning magic to completely skip over everything Rygaard went through while cleaning the ditch.