I've wanted to find out about this for a while. So, in the Mother of Scarabs lair, if you go the deepest level, you can find an altar with a note close to it: "Oh Mother of Scarabs, show me your secrets! I offer my blood and bone, my flesh and soul to you. Feast upon my heart, drink from my skull, divulge your darkest mysteries to me."
As part of my research, I tried to follow the inscription statement sort of literally: I gathered bones, blood, meat and a I think it was a soul orb, and put those elements on the coal basins next to the altar (I think I even tried a different order in which I placed the items on the basins). I was expecting that maybe a teleport would open up, but nothing happened. I wanted to at least try it.
So, has anybody got any information, theories or heard any rumors about this place? I'm curious about it.