@453 reminded us on Discord about the connection between the arrangement of braziers in Alaric's void room and the Sefirot tied to Kabbalah in Judaism. It's come up before in various contexts, but I'd completely forgotten. Given the lack of ongoing topics, I thought we could use a bit of pointless speculation around here 😛!
Anyways, the arrangement is indeed tied to the Sefirot because, apart from the obvious match in layout, each sefirot, the word itself meaning "sapphire", corresponds with the name of a Sapphire Book in Cythera. If you use the order given by Selinus (Crown, Wisdom, Understanding, Mercy, Power, Beauty, Victory, Splendor, Foundation, and the Kingdom), you'll get the layout Visitor described here:
You'll notice there is no "Da'at" in Cythera's Sapphire Books. This is "Knowledge", which Wikipedia describes as the "Central state of unity of the 10 sefirot, also called the Tree of Life". This brings in the connection to the Tree of Life. Presumably, once you light all 10 in the order given by Selinus, you were to be teleported to the Tree of Life map. This would also explain why we never found a zone entrance for the Tree of Life, just a point that puts you somewhere on that map and an exit that puts you somewhere west of the mountains.
Another thing I'd forgotten is that the logic for detecting the lighting and ordering is already in place. If you do it, the screen flickers and you'll get the message "It is not in the lightning bolt that one finds knowledge, but the tortuous serpent path that returns."
So then I thought a bit more about the layout of the Tree of Life map, and I wondered if the finished map was meant to be something like this:
Basically, you could go to the region at the beginning of the game, but the bridge would first require repair to proceed. Once you've developed a character to the point of having the tools to do this, you would enter the "tortuous serpent path". This is supported by the fact that there is a zone entrance there, but it currently points to the default "Nothing" map. I would expect a labyrinth similar to the teleporting one below Pnyx. For that matter, parts of the crypt below Pnyx may have originally been intended for the Tree of Life given its proximity to that zone in the data, but then repurposed as a puzzle for Pnyx when Gandreas decided not to finish the Tree of Life. Once all that's done, you would be able to exit and finally reach the Tree of Life! As we know from BW's testing, each of the three apples can max out the hunger stat. You could probably go the whole game on nothing but these apples.
I know it's retreading familiar ground; I'm just hoping to centralize some of the discussion for easier reference and commenting. It also made me wonder what would be involved in making the Tree of Life actually work in-game. Of course, the zone itself would have to be completed in some form, which isn't particularly easy, but is possible thanks to delvmod and redelv. Then would be connecting the trigger that shows the message about knowledge with a teleportation action. I'm admittedly ignorant of how Cythera handles these types of events, so I'm not sure if it's a change to the LKH environment or what. Anyhow... speculative ramblings.