Incendiary Arrow

An incendiary arrow is any arrow type (except bone or stone) with a wad of hemp soaked in a bituminous substance (such as tar) placed just beneath the head. The hemp is lit before the arrow is fired.
In addition to its normal damage, the arrow causes one additional hit point of fire damage on the round of impact unless the target makes a saving throw vs. death magic. Flaming arrows may ignite combustible materials contacting it.