The village booster potions that were given out during compensation. for me they don't work. Even when I have taken nothing no pie or anything I still can't use them.. A message saying something like I am already under the effects of a similar thing. So I still have all the villager pots.
There has been a post about this somewhere on the forum. Incidentally potions were given out that cannot be used in combination with Ardent Society Membership. Just hang onto them though, with the release of the new expansion, the potions will be fixed.