2011 · ソースブック（プレイを拡張するルール／オプション）

WCP's Monstrous Garage Volume 1

This monster supplement presents six creatures ranging from level 3 to level 13, including flying fungus and a tar-coated drake. Each creature uses a shared stat block that can be modified with different claws, teeth, auras, and other features to create numerous variations. The book also includes frequently asked questions and design notes explaining how to apply these techniques to original creatures or other published foes. Each creature is illustrated, with an exclusive cover illustration.