In Greek mythology, the primordial state of disorder that exists before the creation of the world, or the first being or deity to exist.
In the Warhammer franchise, a demonic antagonist that sends demons, monsters, warriors, and beasts to wage war on the games' setting.
A planetoid and cubewano orbiting in the Kuiper belt.
Any specific one of several historical reigns of terror.
The Reign of Terror during the French Revolution.