Awww poor baby, you are playing such a difficult army! Heaven forbid you don't get an all amazing death beam that fucks everything and is a flyer too!
That said, the rules do state draw a line, kill everything in it...RAW it totally just rapes everything. Should it be that way? Certainly not, it's a straight line, much like a laser beam, that Should
only hit things it actually passes through, so it could go at an angle and hit ground targets that way as the beam hits the ground...however that's not how the jackass Ward in his infinite wisdom
decided to write it. This thread should not be this long, RAW it works, end thread.