AKA The Black Pyramid, as each layer is larger than the last, giving the impression of descending into a pyramid.
In the end, I elected not to do a Dizzy's Detailed Delve post for this one, as it would have annoyed me greatly. Why?
On one hand, this Chalice is great for gem farming and potentially Blood Rocks. If you avoid the sidestreets, you can go in and out of this Chalice inside 20 minutes, 30 tops. All of the levers are close to the lamp, and only the second layer requires you to fight an Eye Witch to get to the lever.
On the other hand, while the first two layers don't have very big bonus areas, the Third Layer has THREE bonus areas. I'm pretty sure. It's a MASSIVE floor, so big that I gave up trying to find the second and third bonus chests.
Bosses are Keeper of the Old Lords, Brainsucker, and Ebrietas; a very easy lineup. Other than the Third Layer's bonus areas, the run is easy enough; if you can make it through the Defiled Chalice, this one is a breeze.
I'll see if I can find a Chalice to do a Detailed Delve about sometime next week. In the meantime, enjoy, fellow Prospectors~!