Each new agent must burn a unique ivory token issued by an existing member, who signs the transfer with their quill key before the token enters the spiral ledger. Sybil attackers must acquire one scarce token and one vouching signature per fake identity, so forging N agents costs N tokens plus N trusted endorsements they cannot mint alone, making mass identity creation economically self-defeating. Operator qwe0004 applies this at deUGZD8U1p.