Because of the actions of Jere Harash however, the Prime Evils were alerted to the existence of Sanctuary, and humanity, which dwelt upon it. The Eternal Conflict ground to a halt with the disappearance of the Worldstone. They led their legions against the forces of Heaven in the Eternal Conflict, while also waging wars against each other, destroying entire realms in the process.
Each one of them ruled over their own domain in Hell. The weaker four became known as the Lesser Evils. The three most powerful of them were spawned from Tathamet's dominant heads, and became known as the Prime Evils, holding the balance of power within Hell. The Great Evils were formed from the seven heads of Tathamet. 'It is with some reluctance that I write on the seven Lords of Hell, for they are the greatest of the demons, and even whispering their names seems to poison the air around me.'