feat to use weapon finesse with a long sword

[pbd]

Is there a WoTC source feat to use weapon finesse with a longsword?

Thanks.

 

[VonRichthofen]

Graceful Edge. From somewhere drow-related.

EDIT: Not sure about the WotC part.

 

[heirodule]

EWP: elven thinblade?

 

[pbd]

EWP: elven thinblade?

There is that, but I would prefer the longsword + feat route

 

[jasin]

Graceful Edge. From somewhere drow-related.

It's from an adventure in the Age of Worms path, in Dungeon #128.