Your army may include any number of units of Chaos Spawn. Units of Chaos Spawn do not use up any Force Organisation Chart selection, but are otherwise treated as a Fast Attack unit. All of the Spawn in the Force must be divided into as few squads as possible
Units of Chaos Spawn always move as far as they can towards the closest enemy. They must always try to assault the closest enemy. In close combat each Spawn has D6 Attacks - roll every time they are about to attack. Units of Chaos Spawn never count as scoring units.
Fearless troops never have to fall back and are assumed to automatically pass any morale test they are required to take. They can never be pinned. This special rule is gained by any independent character joining a Fearless unit. Also, as long as a Fearless character stays inside a non-Fearless unit, he loses this special rule.
Models with this ability always move as if they were moving through difficult terrain (typically rolling two dice and choosing the best as their movement rate). In addition to this, they are always treated as stationary when shooting, and never receive a bonus attack when charging into close combat.