"Damn it!"
The Seven Deadly Sins had awakened, and the Three Sources of Evil were the ones who suffered most.
God of Conspiracy Tzeentch's face darkened. He had never expected Slaanesh, the quietly born Fourth Source of Evil, to be snatched away by Athena of Allure, one of the Seven Deadly Sins.
The Seven Deadly Sins had awakened ahead of time and occupied the Primal Abyss, claiming the mantle of the true heirs of darkness.
As the Seven Deadly Sins rose, they set their sights on the Seven Virtues. The forces of darkness now had leverage to balance the Light Alliance.
The Star Sea Rules had no emotions and wouldn't favor the Three Sources of Evil just because they had brought them into being.
The Three Sources of Evil were tools for balancing light and darkness. Once the two sides returned to balance, the tools could be discarded.
When eras shifted, the Goddess of Light fell into slumber and the Abyssal Demons emerged, with darkness suppressing light. At that time, the Star Sea Rules abandoned former sources of darkness they had once supported, such as Fel Energy, Nightmare, and the Necrotic Realm.
Resources were then redirected toward the forces of light. Goddess of Blood Moon Sunada took control of the Nightmare Fiend, while Goddess of Night Nyx brought the Nightmare under the Rules of Night.
After the Holy Remains Rule devoured the Necromancy Rules, Medivh took control of the restored Necrotic Realm.
Fel Energy lay dormant until the forces of light pulled ahead once more, when God of Conspiracy Tzeentch was brought into being.
The Primal Abyss would balance the Light Alliance, while the Purgatory Demons would balance All Spirits of the Star Sea. Suddenly, the Three Sources of Evil had lost their purpose as tools.
The Star Sea Rules