The Oak is the Great Tree of Possibilities. The Koi Pond is the Lake. by metonymy, possibly Cavern/Restoration culture? The cave is the Cavern. If Dr. Realist is right about the poisons being abstract, I would guess that one of them is pride. I suspect that AethericChimaera may be a bahro nekisahl (or might just be sympathetic to them), in which case the crawling supplicants are probably the bahro shoraht.