Nightbringer

Nightbringer was a sword forged at the Celestial Citadel from ore gathered by the Dream Star. Nightbringer was said to feast on the screams and deathrattles of those is slayed. This "muffling effect" along with its impossibly sharp edge made Nightbringer an exceptional weapon for those that wanted to make quick, clean kills. Like all weapons forged from the metals of the Dream Star, Nightbringer had a soul within it.

It was used in the War of the Three, where it saw extensive use cutting the throats of various mages and scouts. After the war, it ironically fell into the hands of Vash, who proceeded to use it as a component when forging the Godslayer.