Subexistence (Tylorria or the World Below) is an empirical layer of cosmic reality which can be accessed by anyone whose mind is found in a state between living and dying. The Alarians amass the only civilization in cosmic history to have significantly explored the hidden reality of Subexistence. Mind, they have equally decided that whatever lies down there is too dangerous to interact with. For that reason alone, the knowledge of how to access Subexistence is kept within the few, along with any specifics about its internal structure.
However, consensus exists among the Guild of Weavers about the nature of Subexistence, which tends to take the shape of the visitor’s internal architecture (their mind map). The few people to have visited Tylorria report a twisted universe of infinite paths and outcomes which seem to contain all the discarded choices – past, present and future – an individual made or will make throughout their existence. Given the intricate architecture of Subexistence, it is very easy for one to lose their way while navigating the infinite ramifications of their individual choices.
Not only these discarded choices can be interacted with, but any small change the visitor makes during their visit – which can only be achieved through Weaving – will result in a complete reshuffling of cosmic reality at a meta-level. This generally means that Weaving into Subexistence will sent ripples throughout the space-time continuum and influence the reality outside Subexistence, often with grave consequences to reality as a whole.
It is because of this reason that Subexistence is kept secret, out-of-bounds to anyone but a select few, who have, in turn, sworn to protect the integrity of the multiverse within and without. Commonly referred to as “the key to all outcomes” and “the path that leads to all paths” Subexistence is currently under the vigilant protection of both the Guild of Weavers and the Guild of Scribes.