It is a powerful Spirit oppositing the Holy Angel. It is a Spirit known as a seed projected by the demonic plane.
When the Spirit is activated, darkness began swirling around the user, twisting and shifting as a pair of jet-black wings extended from its back.
The Fallen Angel's ninth soul skill is always the same. It was a door that led to the demonic plane. When the door was opened, it linked the demonic plane to Douluo Continent. Terrifying demons dashed out from the door.