As an action, a weapon you touch vibrates with anticipation. For the duration, the weapon deals an extra 1d4 concussion damage when it hits.
If the attack misses by 4 or less, the weapon deals half as much damage.
Alternatively, you can touch a quiver containing arrows or bolts, granting the ammunition pulled from it the same effect. The spell’s magic ends on a piece of ammunition when it hits or misses.
You can increase the damage by 1d4 for each additional mana expended.
You can expend 1 additional mana to cause an additional weapon you touch to vibrate with anticipation.