Die Quacksalber von Quedlinburg: Die Kräuterhexen is the first expansion for the Kennerspiel 2018 Die Quacksalber von Quedlingburg. The expansion is now in stock and pre-orders will get shipped tomorrow morning. We only have the German edition so far, but like with the German base game the expansion is completely playable with the English rules translation available on BGG.
The expansion adds the components for a fifth player, a new herb and new ingredient books to the game. If you would like to learn more about the expansion, here is a video review: