Name: Eternal Darkness or Dark Mistress.
Age: Before the dawn of time.
Gender: Female.
Species: Dark Deity.
Personality: She is calm, manipulative, persuasive and can be aggressive when pushed to her limit.
Looks:

Superpowers: Shadow Manipulation and Dark Magic.
Weapons/Gadgets: Darkness.
Weakness: Holy Light.
Health: 2,000/2,000.
Boss fight Scenario: You see a black portal in the sky as a black figure flew down and crashed to the ground. You ran towards it.

Pet: Ravager
Looks:

Personality: Primitive, aggressive and unintelligent.
Powers: Super Strength and Healing Factor.
Weakness: Holy Light.
Health: 2,500/2,500