>>30794353Rarest is either Fauname or AmeRyS, on the EN side.
Nothing in Myth is rare. Council has some good Time Sister arc, some good Wamei, and some Amebae, but less Fauname. And AmeRyS is the purest of crack.
IDs or JPs will be way more wild than that, though, depending. Ame/Botan, Ame/Koyori, Ame/Sora, most JPs will be something new.