The Timeline to Extinction is what the elves (mainly the Councillors) use to inspire hope in the elvin world. It involves the fact that the elves do not let a single species on Earth go extinct. They saved everything from Dinosaurs to Woolly Mammoths to Unicorns. In Neverseen, the two remaining alicorns, Greyfell and Silveny, are nearly killed by the Neverseen, and it is revealed that their death would reset the Timeline to Extinction. The Councillors believe that every species should be preserved and sometimes send teams/people to capture creatures from the wild (including the Forbidden Cities) and bring them to Havenfield or other rehabilitation centers to prepare them for transfer to The Sanctuary.

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