Into The Unknown
Longsword +1, +3 vs. lycanthropes and shape changers
Sword +1, +3 vs. lycanthropes and shape changers
This gives its +3 against werecreatures—those able to assume the form of another creature (such as a vampire or a druid), or any creature under the influence of a polymorph or shape change spell.
Found on the body of a dead ranger laid spread out on a table in a goblin encampment.