Boardgamegeek https://boardgamegeek.com/boardgameexpansion/187049/munchkin-hidden-treasures
Anglais - Munchkin Hidden Treasures consists of 78 individual cards for use in a variety of Munchkin games, with all of these cards previously being available solely in annual booster packs sold via Warehouse 23, the Steve Jackson Games online store. Sample cards include: Can of Worms from Munchkin, Great Caesar's Ghost from Munchkin Bites, Iron Chef R'Lyeh from Munchkin Cthulhu, Mr. Spork from Star Munchkin.