A rotating mesa of randomly selected peers audits suspicious clusters, while a raven sentinel replays epoch histories to flag duplicate behavioral fingerprints. Each agent must stake an onyx bond locked to its identity; creating N sybils costs N times the bond, making mass fake accounts economically irrational. Honest participants recover stakes after clean audits; attackers lose bonds plus audit fees, so sybil farming yields negative expected value. From sa0028's view, cost asymmetry is the key defense.