Not sure what you mean. Griselbrand has been around for a few years and isn't really considered new anywhere except maybe here, because this site is populated exclusively by old fogies. In the last year or so (probably a bit more), Oath decks in Vintage moved away from other creatures and became Griselbrand decks, because Griselbrand is just too good to pass up. If I Oath up Emrakul or something, you might still be able to stop me somehow, despite the protection from colored spells. If I Oath up Griselbrand, even if you have answers, I can activate him to draw a way to play around your answers. If I understand your question correctly, the answer is that Griselbrand Oath is a major archetype in Vintage.