Bladebearer of Valenar( Player's Guide to Eberron, p. 141)
You have trained extensively with scimitars, including the Valenar double scimitar. You are adept at striking from horseback with the curved blades of the Valenar.
Elf, proficiency with scimitar or falchion, region of origin Valenar,
You treat the Valenar double scimitar as a martial weapon. Also, you deal an extra I point of damage when making a melee attack with a scimitar, a falchion, or a Valenar double scimitar while mounted.
If you have any of the following feats for the scimitar, falchion, or Valenar double scimitar, you can apply the feat's effects to all three weapons: Improved Critical, Greater Weapon Focus, Greater Weapon Specialization, Weapon Focus, or Weapon Specialization.
When you spend an action point to influence an attack roll made with a scimitar, a falchion, or a Valenar double scimitar, you also add the result of the action point die to your damage for that attack.