Battle Spirits Saga: Inverted World Chronicle Strangers in the Sky: Booster Box [BSS05]DOUBLE COLOUR CARDS MAKE THEIR FIRST APPEARANCE Double colour cards with symbols of two colours arrive on the scene. Double colour cards include not just spirits but nexuses and magic as well! The new keyword effect Chain also makes it easier to construct multi colour decks opening up a whole new range of strategies. ASTRAL A NEW COMBAT FEATURE! The envoys who appear in the story possess a special Astral power which is also featured in the gameplay.