Warp Lightning Cannon

Before you roll the dice to determine the power of an attack made with a Warp Lightning Blast, if there is a friendly WARLOCK ENGINEER within 3" of this unit, you can say that the engineer will increase the weapon’s power output. If you do so, roll 12 more dice instead of 6 more dice for that attack. However, for each unmodified roll of 1 on those 12 dice, this unit suffers D3 mortal wounds after the attack has been resolved. The same unit cannot benefit from ability more than once per phase.