>>24785086
>They were devil worshippers who practiced blood magic in order to create abominations.

Probably, but the Valyrians were not "subhumans" they were in fact genetically enhanced _super-humans_ who in our distant future enslaved (regular) humanity here on Earth and later colonized Planetos.

But a civil war among them almost destroyed the planet (possibly causing the weird climate) and knocked civilization back into a stone age, where everybody (other than the few remaining Valyrians) forgot their Earth origins.

The Valyrians would then use some of their remaining tech to create dragons and founded the Valyrian Freehold but the Faceless Men would steal some of this tech and create magical "nukes" and (after first testing them on Hardhome) topple the Freehold.