[@Transience] the Lazarus (reference to "Lazarus demon,") never truly dies. It's not so much that it goes out into the world and then comes back each time it is "slain," so long as some of it remains it can reconstitute itself. It's more like it is bound to the mortal plane of Ansus, but takes some times to reconstitute itself when its body is destroyed. So it's not so much resurrecting as it is reconstituting. Which could be misconstrued as something that legitimately dies and then comes back (which could be another detail that is lost in the annals of history. It would be why even after so much time people still know of their legend, just a thought).

As to Lyr's abilities, that would make some sense. If spirits and their energies sort of become incorporated with the world after death he would more or less be able to perceive their energies alongside that of other energies. It is logical that he'd be able to perceive the Heavens and the Merkstave to some degree. The "Vale," could just be reference to the boundaries between these "planes," and also what connects them perhaps? Something like a veil between words (the name is sort of a play on the word veil, since they're pronounced the same).

One of his other themes (something he did during his lifetime) was exorcise errant spirits and entities which had retained attachments to the mortal realm. He sometimes purified them, allowing their energies to "pass on," (in this case, become integrated with the world as is natural). Other times he could not successfully preform exorcisms/purification of a given entity. These, while he could destroy it, scattering its energy into the world, rather than allowing it to peacefully pass on, he did not...instead he cut the link they had to a person/place/object which embodied their attachment (whatever they were haunting more or less) and rewound a bond between them and himself.

This is a core aspect of him as a character because it is part of how he attains his height of power and as a result it is shown how this power is a burden to him, though one he takes on knowing it is likely to destroy him.