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 1d6 necrotic 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 1d6 for each additional mana or psi expended and an additional 1d6 for every two additional mana or psi expended.
You can expend 1 additional mana or psi to cause an additional weapon you touch to become sheathed in shadow.