The Karst Cave

The Karst Cave is an underground world under Katib built by the Ancestors. It’s also where the Ruins of the Ancestors are. After the fall of this ancient civilization, no one had entered the Cave until 15 years ago when Higgins and Vaillant opened the entrance to the Colossal Grave here. After that the Church didn’t abandon this place, but turned it into a prison.

As the Diary of a Guard states, “the imprisoned guys were sentenced to death by Proxy”, but for some reason he’s been hiding them here.

From the other documents we can see that Eckhart, who seems to be in charge of this place, has been conducting numerous experiments on prisoners here throughout the years. Somehow he discovered a way to transform people into Colossi-like creatures through cutting their bodies in a particular way, wrapping them tightly and hanging them upside down. Then the subjects are given strange berries that have a smell of raw meat (Careless Handwriting) and glimmering pink buds, eating which makes prisoners “feel pain the 1st time they eat it due to it’s dangerous taste. And those who have eaten the bud say that they see light, endless light...”. Most of the prisoners don’t survive this procedure and die sooner or later. Those who survive Eckhart planned to use as “a kind of sharp weapon… They will help me to lead the pathetic humans out of the abyss and to their final goal...” (A Broken Note).

Here Eckhart also tried to find a way to reopen the Grave by murdering Vaillant. Guards described the imprisoned Vaillant like this: “Under the tattered clothes hanging from his body… Oh my god. His arms and calves could hardly be considered human limbs, they are just  a few pieces of meat hanging from the bones...” (Yellowing Pages).