Bind to Hell

The targeted weapon shudders and momentarily emits a moaning chorus, like that of famed souls. 
This spell places an infernal blessing on the touched weapon for the specified duration (+a day if cast at higher level so at 9th would last for 5days). Upon casting you must name or describe a specific creature. If that creature is subsequently reduced to 10 or lower hit points by a low for the blessed weapon, its soul is whisked immediately to the Hall of the Vanquished in Stygia. Where it remains forever unless rescued(no spell to revive one killed with way will have effect). The weapon can be blessed again after 24 hours pass.