You remember this thing needs to fly, right?
The contraption for shooting such a weapon will be similar to a ballista. It will be shot from the air, forcing the contraption to be stronger as the craft needs to keep stable.
Because too much of a weight at the front will cause it to nosedive, the weight will need to be evenly distributed along the craft.
Then it needs to be able to lift off, presumably without powerful engines. It will be in the air, which is a thousandth the density of water.
It's a glider, it needs to hold itself up. It will be huge.
And even assuming you can do all that, you need to be able to hover and accelerate/deaccelerate at will.
And even then, if you somehow manage to do a feat which even now we can't do with much control, you have to be accurate, and the cost can't be too prohibitive.
All in our universe's physics, of course, but I don't see any evidence pointing to the contrary in Cera Bella.
So why not just use a Psy and save the world with deus ex machina?
You can't shoot an arrow through two people.
Its not an arrow remember, it is a bolt, a bolt is smaller and it can trave faster and pack more of a punch
What cow poop you spew out.