Sins

The sins of darkness are four beings, remnants born of the creator of all matter and space, Darkness. As agents of the darkness, they seek to corrupt and destroy its rival's most prized creation, life, and claim dominion over all of Terestria. The first step in achieving this goal is the creation of the Dark Wings, the antithesis of the Light Wings in Lucia's possession.

Once the sins have discovered a person corrupted enough to wield its power, they will grant them their power and allow them to summon the sins at will and use them to take and rule the world by force.