The Midnight setting has Icewood Longbows:
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Exotic Weapons Cost Dmg (S) Dmg (M) Crit Range Weight Type
Icewood Longbow 500vp (value points) 1d6 1d8 x3 120 ft. 4 lb. Piercing
Longbow, Icewood (restricted): These pwerful weapons are granted to those Erunsil who have proven themselves in battle. They have +2 hardness and +10 hit points, and are considered masterwork for the purpose of crafting times, though the creator must spend twice the normal time if he wishes to grant the normal +1 enhancement bonus to attack rolls as well. All icewood bows are composite longbows, though their strength ratings are variable.
This variable strength rating is one of the icewood bow's exceptional properties. It adapts itself to the Strenght of any proficient wielder, gaining a Strength rating equal to the wielder's Strength modifier. However, thanks to a combination of the bow's resilience, flexibility, and powerful pull, the bow's arrows do damage as if the wielder's Strength modifier was doubled, up to a maximum of a +6 Strength bonus to damage.
On the other hand, if attempted to be drawn by anyone with a 16 Strength or greater who is not proficient in the bow's use, it shatters. This has allowed the weaker snow elves to match their orcish opponents' strength in combat while preventing their foes from gaining much benefit from, or indeed learning how to use, the weapons.
Finally, the mystical properties of the icewood from which the bow is crafted means that it is easily enchanted; doing so costs only one-half of the standard resources of time and XP.
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It may need a price modification though.
