Chain Lightning is a direct damage spell with a range of 24". Chain Lightning causes D6 Strength 6 hits with the Lightning Attacks special rule. Once the damage has been resolved, roll a D6; on a 3+, choose an enemy within 6" of the initial target – the lightning leaps to that unit, which suffers D6 Strength 6 hits. Keep rolling for further victims (each within 6" of the last target struck), until the roll is failed or there are no more viable targets (a unit can only be the target of Chain Lightning once per Magic phase).