Hi! I recently revamped the Garuda page for the FF Wiki and I could not find a single source for that first backstory about drinking blood and going mad and such so I removed it. If such backstory exists it is nowhere to be found in the current Final Fantasy XIV or the Encyclopaedia Eorzea (at least the first one, which is the one I have ready access to). This information allegedly comes from the original Lodestone I believe, but I've been searching through the archives and have yet to find it. It was presumably factual at some point, especially since reputable sites like Gamer Escape (née Eorzeapedia) had that in their info, but I haven't been able to corroborate it from a primary source. If anyone can find it and confirm that backstory I would also appreciate it.

Relevant: Original Lodestone archive