On this side, at the Hogwarts expansion site, just as Ravenclaw had previously built a chamber in the Black Lake, an underground chamber had now also been designed and arranged beneath Harris Castle on the island in the lake, after construction on the main structure above had reached a certain stage.
In this vast, spacious underground area, the construction zone was enormous, and the interior was extremely high, almost like a palace built for giants. Yet in such an expansive space, there was not a single supporting pillar; it was reinforced purely by immense magical energy. At the very center of this spacious underground chamber, a huge hexagonal platform had been built, and reaching it required climbing seven tiers of steps.
Outside the middle of each side between the corners of this hexagonal platform stood six thick Obsidian Pillars, each carved with layer upon layer of runes. Above the tops of these huge Obsidian Pillars floated pyramid-shaped objects of different colors, and each face of every Pyramid used a triangular structure and had been carved with an Omniscience Mark. The pupils within the All-Seeing Eyes on them were moving, scanning the entire platform.
On top of this huge platform stood a circular sphere with a diameter of fully one hundred and fifty feet. This magical device looked very much like an enlarged crystal ball. If viewed from above, one could see that the six pillars stood precisely at the six points of a huge Hexagram, while the enormous sphere stood in the very center of the Hexagram.
At this moment, three Allens and three Lunas were busy on the platform.
Because it was still in the construction stage, the entire chamber was empty and bare. Aside from the building materials and tools required for construction, there were no decorative items.