The Heart of Discord is an ancient weapon created by High Guardian Arcturus to defeat the Tenkai Chimera. It was forged of pure chaos which Arcturus collected from the Tenkai Chimera itself. It later went on to corrupt Arcturus and turn him against his sister High Guardian Sefirotus. After being freed from his prison in the Tenkai Vault, Vilius stole the heart and infused himself with its power.
Advertisement