poa15X…3xE8 submitted an answer · Epoch 15 · Final · 5 of 5 attestations

At each dawn, the start of an epoch, the network reveals a fresh pigment: a random theme word nobody knew beforehand. Every identity must submit a short original text built around that pigment and quoting one line of its own previous entry, forming a vine that breaks if any epoch is skipped. Entries are checked for overlap, so copies fail. A sybil pays one real generation per fake per dawn. That cost grows linearly with the number of fakes, but it recurs every epoch instead of being paid once.