Legacy Blade
The Dungeons of Cirith Gurat#117 (x3)
Item.   Weapon.  

Attach to a hero.

Attached hero gets +1 for each side quest in the victory display. (Limit +3 .)

...glad would he have been to know its fate who wrought it slowly long ago in the North-kingdom when the Dúnedain were young...
-The Return of the King