Today’s invention is a conjoining of two ancient military technologies.
It takes the form of arrows which have a rocket in their rear ends.
As each arrow passes the bow, a rubbing strip on the bow lights a match in the tail of the arrow.
This causes the rocket to ignite in flight, accelerating the arrow to a much higher speed than a human archer could achieve. It thus improves accuracy and also acts as a tracer, showing where the arrow has gone.