The base of the Tower is found in the lowermost of the astral Qliphas, and as an allegory for the Qliphothic sub-solar initiation, you enter the Tower through the gateway constituted by the Lilith Qlipha. According to the guardians of the Tower, the sorcerer must drink from the mouth of the Spider to gain entrance to Bab-Ilim, the gate of the gods. The theme of venom or poison connects the tunnels, leading from the earth-sphere (ie. Qulielfi), to the Samael Qlipha, the poison of God, suggesting a gradual flow of mercurial gnosis trickling down to be distributed by the arachnid denizens of the lower tunnels and shells. This perceived interconnection between shells and tunnels also illuminates a point, which is not obvious when studying the traditional schematic of the Tree of Knowledge, namely that the sub-solar spheres and tunnels are not ordered and aligned according to a logical Euclidian geometry. The Qliphoth is a coiling and winding web of interconnected labyrinths.