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.
The plot hooks section is quite slim, especially with the mischief and outright disaster an anti-magic banner can wreak.
Also, I'd suggest adding some quirks and more personality a) to the known banners b) to the banners in general. So far, they're indestructible anti-magic banners. Woo.
It's okay, I guess.
I'd have welcomed alternative uses - so far, it's pretty straightforward.
> Blood beasts, in making all blood as one, could serve as universal transfusions!
> They could be distilled into healing agents!
> A colossal blood beast, stuck in a magical trap, could leak and feed a debased tribe with a fountain of unholy blood!