Fire Overwatch

When: Your opponent's movement or charge
phase, just after an enemy unit is sets up, moves,
advances, falls back, or charges.
Target: One unit from your army that is within
24" of that enemy unit and that would be eligible
to shoot if it were your shooting phase.
Effect: If that enemy unit is visible to your unit,
your unit can shoot that enemy, but an
unmodified Hit Roll of 6 is required.