First created by elven clerics to allow their warriors to wield a longsword in each hand, a featherlight weapon wields like a much lighter weapon, thus counting as one size class smaller for the purpose of determining how easily it can be wielded. For example, a human’s featherlight greatsword could be wielded as a one-handed weapon, and an elf’s featherlight longsword could be wielded as a light weapon.
The weapon’s damage is unchanged by this enhancement. Due to the inherently “light” nature of the enhancement, it cannot be applied to weapons sized for creatures larger than Medium, and for the purposes of disarm attempts it counts as if one size smaller (a featherlight longsword is as easily disarmed as a shortsword).
Faint transmutation; CL 5th; Craft Magic Arms and Armor, cat’s grace; Price: +1 bonus.
Author’s Note: In v3.5 rules a Greatsword sized for a Large creature would deal an average 3.5 points more damage than one sized for humans, which is too powerful for a +1 equivalent enhancement. At best, this enhancement allows a person to wield a greatsword one handed for an average +1.5 points damage over a longsword, which is about right for a +1 enhancement.