Thunder Projectile

This spell transfuses an arrow or cross-bolt with 1d6 thunder damage in addition to the default damage. It also causes the target to be stunned if it hits the target. If it misses, depending on how far it is away from the target (if you roll 5 below the required amount, no damage at all will be taken) thunder damage may or not take effect on the target. If you roll a 1, you take that thunder damage yourself.