The Sanguine Fang

The Dust-Wardens set Thornmaw loose to crack the bones of oathbreakers. This came out of the same pit, and the archivists hold it is one of Thornmaw's own fangs, shed or broken, and that the wardens hafted it and used it to swear the oaths Thornmaw would later enforce. A weapon from something that bleeds. Sharp in spirit, if not in material.

Layer by sanguine layer. In the public record.