Corruption Kingdom

A young mage takes on his master's name to infiltrate the ancient castle of the Demon King, hoping to claim its power and grow stronger. However, deep within the castle, he discovers a fragment of the Demon King still clinging to existence. Before fading away, the dark entity bestows upon him a forbidden gift—the power to corrupt and control others. With your newfound ability, you set your sights on your next target… the hero’s four companions.​