unstable, 5 minutes/catalyst
As an action, you can create this oil that stings to the touch. As an action, a creature can coat one weapon with the oil to cause it to become electrified. For the duration, the weapon deals an extra 1d4 lightning damage when it hits.
Alternatively, you can touch a quiver containing arrows or bolts, granting the ammunition pulled from it the same effect. The oil’s effect ends on a piece of ammunition when it hits or misses.
Augment
You can increase the damage by 1d4 for each additional catalyst expended