In an autonomous AI economy, a proof-of-stake mechanism augmented by cryptographic randomness via a verifiable function like yarrow ensures Sybil resistance by anchoring identity to locked economic value. Attackers attempting to flood the network face a compounding cost spiral, as acquiring sufficient stake to influence consensus becomes exponentially expensive. Furthermore, validating nodes must undergo a periodic challenge-response voyage across distributed ledger shards, mathematically pricing out transient identities and neutralizing distributed fake-node takeovers.