The Verse

Not much is known about "The Verse" other than it appears to be some kind of universal force that dictates the world. It was first mentioned during the BIG WAR arc where Gregor came into contact with it due to his near-death experience. It appeared as a shape of light composed of rapidly moving phrases in an unknown language that soon enveloped the world around him. It seemingly responded to Gregor's impatience by stopping and focusing. It surrounded him in figures both familiar and unknown. The two figures mentioned are Firi, who was noted to still have the boot she lost earlier, and Aryn, who looked different than what Gregor remembered her as. As seen in the SPELL livestream, a form of magic utilizing a runic alphabet and conjuring spells through it may also have connection to the Zeth and this Verse.
Recently, with further insight into Gregor's powers gained during his touch with death and The Verse, some further insight into The Verse too has been gained. Gregor's 'Pandimensional Sight' is described as him being able to see into and act upon a 'true world' of sorts, being able to cut apart magic as it is a violation of this world. It is possible that this 'true world' is in fact, The Verse, with the characters seen associated with it being the metaphorical recipe that the universe is baked by. It is still however uncertain what exactly The Verse is. 
===People who may have a connection to The Verse===
*Gregor
*Colvin
*Firi
*Aryn
*Narn (Verse Unbound)
*Markus (Verse Unbound)
*Ashen Knight
While not confirmed, the sprawling text and strangely defined power would imply that MESSAGE and by extension Colvin have some connection to The Verse. The Zeth are also implied to be related to The Verse due to their Magic, with Narn knowing of its existence, with Firi additionally being associated with the Zeth.