D&Dtools1

Benefit

You treat the Xen'drik boomerang (ECS 119), the drow scorpion chain, and the drow long knife (both on page 137) as martial weapons. You gain a +1 bonus on all damage rolls when making an attack with a drow long knife or a drow scorpion chain as long as vou have moved more than 10 feet under your own power during the round in which you make ihe attack. For example, being pushed 10 feet by a bull rush attack isn't sufficient to grant you the extra damage from this feat. If you have any of ihe following feats for the dagger or short sword, you can apply the feats' effects to the drow long knife: Improved Critical, Weapon Focus, Weapon Specialization, Greater Weapon Focus, or Greater Weapon Specialization. If you have any of the same feats for the spiked chain, you can apply the feats' effects to the drow scorpion chain. Additionally, when you spend 1 action point to influence an attack roll made with either a Xen'dlik boomerang, drow scorpion chain, or drow long knife, you also add the result of the action point roll to your damage for that attack