Crispin first appeared in the Stellar Crown set, giving the Dragon-types easier access to their dual-type needs
While Silverquill is a strong archetype across all formats, this legendary creature just isn't quite as impactful as we would like, and this sentiment appears to be shared by the market for now
Feed The Swarm is also beneficial in that if there are no enchantments, it can be played as a simple creature removal spell
Teferi, Master of Time I typically avoid planeswalker ults on lists like this because achieving them is incredibly inconsistent, but Teferi, Master of Times static ability makes it much more reliable than most and all the card filtering helps sculpt the perfect hand for those two extra turns
Alolan Vulpix can be obtained from Celestial Guardians: Lunala pack in the Celestial Guardians set
You miss out on white vampires, but Im happy to lose access to that color in favor of blue, which has some of the best typal support cards: Kindred Discovery and Reflections of Littjara