Y is for Yari of Yowling Spirits

[over the course of the month of April, I committed to posting a topic for each letter of the alphabet, sequentially, for every day of the week except Sunday. While I was sorely tired of the challenge after only 15 days, I am trying to "stick to it." Our topic this month? Magical weapons for a B/X campaign. All such weapons are +1 to attack and damage rolls unless, unless specifically noted otherwise. Each of these weapons should be considered unique items]

Y is for Yari of Yowling Spirits. 

The yari is a Japanese spear, and one of the premier weapons of the ancient samurai; from what I've read its mastery was considered #2 in the ol' book of bushido, a bit behind the yumi (#1) and a bit ahead of the katana (#3)...but katanas get all the love because they're, like, the samurai's soul, right?

Personally, I prefer the yari...they're awesome. But I'm weird.

Anyway...the B/X yari is treated in all ways as a standard spear (though I hope you'll treat it with respect...). The yari of yowling spirits is a ghost slaying weapon: any incorporeal creature (shadows, wraiths, specters, or vampires) struck by the weapon takes double damage and must make a save versus spells as if targeted by a dispel evil spell (including the -2 penalty). Failure to save results in most spirits' ties to the material world being cut and their "bodies" harmlessly dissipating (for all intents and purposes killing the creature). Vampires are a special case: a failed save reduces the creature to zero hit points, forcing it to assume mist form.

Spirits that observe a fellow spirit's disruption at the hands of the yari of yowling spirits must make a morale check (with a +4 penalty!) or flee the vicinity of the weapon's wielder.

So simple. So effective.