Alchemists: Publisher Promo Card
Publisher is a promotional mini-expansions for Alchemists. It consists of a single card, with the following text:
Play instead of your Debunk Theory action. On one theory, exchange your seal with one of your unused seals. If yours is the only seal you may (instead or in addition) exchange the alchemical with an unused alchemical.
For more information, visit the BGG listing.