At the horribilorum sorcery academy for witty witches and wizards we are not afraid of ghosts potion explosion the fifth ingredient introduces a new spooky ingredient ghost ectoplasm but don39t panic as the new professors will teach you how to handle it safely and use it to brew powerful new potions this expansion for potion explosion steps up the game to a whole new level thanks to the fifth ingredient acting as a joker players can now trigger even more incredible explosions to prepa