Chain Lightning

Range of 24"
D6 Strength 5 hits with Lightning Attacks.
Then roll a D6; on a 2+, another enemy unit within 6" also suffers D6 hits.
Keep rolling, every time the requirement increases by +1, so you require to roll a 3+ the second time, a 4+ the third time and so on,
until you fail or there are no more targets.