The Tsurugi of Muramasa

This is the Samurai Quest artifact, and an extremely useful weapon. It's a two-handed weapon, so it does from 11-41 damage, blessed +7. It also has a 5% chance of bisecting small monsters and monsters engulfing you, killing them instantly, and doing double damage to large monsters. This weapon, great as it is, is often cursed by players for its two-handedness; if it happens to be cursed in a fight, especially in Gehennom, you are doomed. You cannot cast spells, reach into your pack for holy water, do anything at all with your hands.