Made in Abyss - Vol. 1 Ch. 8.5 - Volume Extras

[MangaDex]

 

[McNugget_Master12]

Oh no. The cursed ruler.

 

[damakuno]

a real life parallel to the "curse" is decompression sickness from diving deep into water and ascending too quickly, also diving too deep has a narcotic effect (caused by inhaling regular compressed air, as the nitrogen under high pressure goes into the blood stream) so it's actually quite similar to the "curse" in a way