It's a decent sub, though talking skulls and annoying ones to boot are no novelty, especially since Morte (Planescape: Torment)
Hence, I recommend checking out Morte.
Also, as a doctor, I don't really think the name is too good. It could use one that's easier to yell, especially in combination with "shut up!", and a funny one at that.
I like their creation story a lot - they're a by-product, accidental and misguided, yet to find a place in the world.
Where I could see improvement is the following:
> Their appearance is archetypally demonic, yet uniform. I'd expect more variety and perchance a slightly more innovative take wouldn't be bad.
> I'd like to know more about their culture.
> Just curious - why the mistyped Valkyries, Shadows, Dragons (Adraghan = a dragon, yes?), Titans, Fey, Trees, etc.?
Thank you Cheka for summing up so many important aspects so concisely.
I just read this, and will read it a few times more.
As for the gift sub - methinks it may be something taking place in another player's setting, a story involving another's submitted NPC, or ...?
Echo approves. They're all useful, some of them quite original too. I especially like 26 - the Fear Scabbard, and 9 - the Tattletale Scabbard.
Still, it could use a little work-over with a thesaurus and a look at the grammar (>it's< means >it is<, >its< indicates possession by it; etc.