This is a promo card for the Siedler von Catan card game distributed in special fairs usually by Mr. Klaus Teuber itself.
The card name is "Guido, der große Diplomat", which means "Guido, the great diplomat".
The card text says: "If your opponent has more victory points than you and you play this card at the very beginning of your turn (before your roll), you receive the topmost Attack-Action Card from your opponent's discard pile. Guido is immune to the 'Spy'."
The card was reimplemented with a different picture and slightly improved effect (removing the requirement to play it before rolling the dice) in the expansion Artisans & Benefactors.