Stingerheads (kasshougashira) are dangerous creatures that live in the sandstone area in the 5th layer Layer of The Abyss, first officially documented by the white whistle Lyza "The Annihilator" and named by her.
Described as the finest predators of the 5th layer Layer, Stingerheads are huge seven-tailed scorpions that reach over 2 meters of height. Each tail contains a dreadful poison that melts flesh and bone, instantly killing their victims with a relentless assault of their tails. While individually they're not too troublesome for experienced Delvers, they often form large colonies and hunt in groups, so avoiding their nest entirely is the wisest course of action. They are not edible, so there's little reason to engage in battle against them. The places where the sandstone was discolored lay the remains of the ones unfortunate enough to fall victim of their poison. Furthermore, the area around its nest has a very particular smell of burned dried vomit. Highly experienced delvers who have left smoke signals using their vomit will likely be able to recognize it.