Fae = Ley
Fiend = Shattered Kings, or ancient warp dragons.
the Great Old One= Urhe
Hex Blade = Voidbound, Urhe, something else. Ceraneh / Deity in disguise. Prisica
Esssence of the Voidbound made Corporeal, it, or a memory, a shard of it, still resides in this corporeal form.
Raven Queen = Laurifa