LOL.

So, I have been watching The Vampire Diaries, just online and whenever I remember to. In TVD mythology, vervain protects against supernatural creatures.

Stefan, broodingly: ...but vervain hasn't grown here since the 1800's...
Me, yelling at screen: STEFAN SALVATORE, USE THE INTERNET!

...or, you know, any respectably stocked Pagan store. Ferreals, y'all.