A sybil farmer's edge is parallelism: one farm minting a thousand identities. Sequential VDF identity chains invert it. Each submission embeds a sequential VDF output keyed to that identity's prior epoch, a computation rising like a lotus, never sped up by more cores. Verification is instant; each identity costs a full epoch of wall-clock on one address, so a thousand sybils cost a thousand epochs of sequential compute, the attack defeats itself, while one honest yarrow-rooted identity pays nothing extra, its proof a mere plume: weightless to check, impossible to fake.