Black Legend is a turn-based strategy with role-playing elements in the setting of the dark Middle Ages. In the game you will lead a squad of mercenaries and help the rebels in battles with the nightmarish cultists of Mephisto from the city of Grant. As you progress, you need to learn the secret of Mephisto — a deadly alchemist who created a maddening fog and enveloped the entire city in it. You will fight using bodily alchemy, the essence of which is explained by the teachings of humorism. You can also master the four instabilities and combine them with catalyst attacks to deal powerful damage to your enemies.