This rapierlike exotic weapon is the size of a longsword but much lighter. like the lightblade, it is favored by dexterous elf fighters and rogues. A character can use the Weapon Finesse feat to apply his Dexterity modifier instead of his Strength modifier to attack rolls with an elven thinblade. Characters proficient with the elven thinblade may treat it as a rapier or a longsword for the purpose of any of the following feats: Greater Weapon Focus, Greater Weapon Specialization, Improved Critical, Weapon Focus, and Weapon Specialization.