What are the Invaders and Abyssals?

@Invaders are a mysterious race of extra dimensional conquers who invade worlds using corrupted copies of the world's defenders. The true masterminds are safe in their home dimension while using @Abyssal revenants to fight their war. The Abyssals are Arsenal Girls risen from the dead to fight their former friends. When covered into Abyssals the girl had no memory of her previous life and is a blank slate for Empress Abyssals to create new soldiers.