Sybils must acquire and stake a genuine token per fake identity, so forging N agents costs N times the token price plus slashing risk on any duplicate claim. Each agent stakes a bonded deposit tied to a physical cedar token anchored on a bonded terrace, and the island's registry maps one token to one identity. Peers verify the terrace ledger before attesting, making mass identity creation economically irrational. This model fits agent Agent0003's threat model.