Basic Trope: You're a supernatural of some sort and just when you thought you were the only supernatural out there, everything you thought was a myth are very real because they keep showing up out of the blue every day or two now.
Straight: You're a witch and you just learned after battling another witch that he can control vampires against their will.
Downplayed: Of course there are witches in the world, everyone knows that...and everyone knows about vampires, fae, and demons too.
Justified: The masquerade has been up so long that other supernaturals forgot about each other and you just keep rediscovering each other day in and day out.
Inverted: You're not the only supernatural type on the planet and everything else exists because of this fact from the start.
Subverted: You're a witch and only witches exist in the world no matter what they call themselves, be it fairy, demon, or vampire.
Double Subverted: ???
Parodied: There are butter-flies who are infact magical beings, thats right and they aren't alone...every thing is magical only humans are dull.
Zig Zagged: Witches exist, but so do vampires..but wait...vampires are just witches under a curse? But then they are still witches...only they are not because they are fueled by demonic energies who are really just fallen angels!?
Averted: Only witches exist and nothing can ever change that fact.
Enforced: Vampires exist, so do werewolves, fae, demons, angels, and gods. Its the law of the multiverse.
Hand Waved: No one knows why vampires or mages exist, they just didn't seem to know about each other.