[quote=@Magnanimity]
<Snipped quote by Codify>

It looks like space? But unnervingly alive? It’s hard to explain. You feel it moreso than you see it.
[/quote]

Hmm. Probably not one of those but bigger, then. Sounds like an Old One. Those tend to be like that, and are relatively common in different universes. But one that only works on dragons? That's rarer.