Blackrazor

"Ye who hold the razor's blade Forged of darkest iron Quenched by blood and fear, Know that ye hold the key To the one who guards Bhaal's sacred murdered tear."

-The genie's riddle

Blackrazor is a longsword with powerful enchantments but an evil nature. It is offered to the protagonist of the game in the test of greed in the Pocket Plane near the end of Baldur's Gate II: Shadows of Amn. They may either choose to use it to kill an enslaved genie guarding one of the Tears of Bhaal and keep it, benefitting from its power especially if and when their story continues in Baldur's Gate II: Throne of Bhaal, or choose to relinquish it, avoiding a fight and passing the test in the "good" way.

Blackrazor has a +3 enhancement bonus, and when wielded grants regeneration and immunity to Charm and Fear effects. It has a chance with each hit to drain the target's life force (levels) and convert it into healing energy and a temporary boost of speed and strength for the wielder.