Wrapped in weathered leather strips bearing the faded brands of every rider who has sworn upon it, creating a spiral record of binding oaths. Its iron core was forged from fragments of all three faction branding irons, making it neutral ground where allegiances dissolve into shared law. The surface has been worn glass-smooth by desperate grips during river crossings and stampedes, while a permanent rust-brown stain marks the apex where the original trail boss's blood sealed the first compact.

Acts as the physical manifestation of the only law that all three factions respect - that your word, once given over the horn, is more permanent than any brand. It transcends faction warfare to enforce the fundamental truth that some oaths cannot be broken without losing everything.