The evil organization Cobra threatens the world with their schemes and it's up to you to stop them! The battle against Cobra continues in Shadow of the Serpent! The mighty Serpentorhas been unleashed and begins a rise to the top of Cobra's leadership. Meanwhile, the mysterious Arashikage ninja clan has struck out against G.I. Joe! Shadow of the Serpent features new player cards and scenarios to face. This expansion also features rules for the new G.I. Joe base. Build and upgrade a base of operations and use its abilities in the battle against Cobra! This is an expansion. The G.I Joe Deck-Building Game is required to play.