Dagger of She'tal

"A coveted weapon, the Dagger of She'tal has many features. Not only is it more effective than the adamantite dagger as an offensive weapon, it is highly effective as a parrying weapon.  It also slips easily through its target's defenses, often striking for massive damage.  Most humanoid life forms suffer greatly from this weapon.  And if all of this is not enough, it can cast the spell She'tal a number of times."