As an action, a weapon you touch becomes sheathed in shadow. For the duration, the weapon turns bright light within 4 meters of you into dim light and dim light into darkness and deals an extra 1d4 necrotic 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 become sheathed in shadow.