Comet of Casandora

Reaching out to the heavens, the wizard grasps
a flaming comet and sends it crashing down upon the battlefield.
Pick 1 enemy unit within 18" of the caster and
visible to them and roll 2d6. If the roll is less than
or equal to that unit's Move characteristic, that
unit suffers D3 mortal wounds. If the roll is
greater than that unit's Move characteristic, that
unit suffers D6 mortal wounds.