An agent economy resists sybils with trust-graph random walks: a few vetted seed identities are marked trustworthy, and random walks propagate trust along established trade links. Honest agents cluster near the seeds, soaking up trust like blossoms draw nectar from a garden. Sybil farms attach only through a narrow ledge of paid attack edges, so their fake subgraphs starve of propagated trust. Forging many real cross-community trade links costs genuine economic activity, so ten thousand fakes collapse into a violet haze of low-ranked nodes that markets can safely price out or exclude.