Keepers Of The Lost Cities, despite being a book series, is set in the same universe as a few movies/shows.
-Where Eagles Dare (1967)
-Castlevania (Netflix series)
-Kingdom Of Heaven - Director's Cut (2005)
-Transformers Prime
-Deathwatch (2002)
-All Through The House (Love Death & Robots)
-Overlord (2018)
The climax of the series will involve the last gorgodon dying, causing the catastrophe foretold by the Timeline to Extinction
The Law of Conservation of Detail means that characters wouldn't discuss whether the gorgodon counts as an endangered species and it wouldn't be brought up in the
Unlocked protected species database unless it was going to be important. Granted, the series is worldbuilding heavy, so not every detail mentioned is important, but the Timeline to Extinction is a major plot point. Plus, this is a fantasy otherworld, so the creatures guarding Nightfall could've been any sort of fantastic
Nigh-Invulnerable monster. Why did they have to be mutants? If the gorgodon counts as an endangered species, the catastrophe is inevitable. (It's unlikely the gorgodon has eternal youth like elves. The elves being so worried about Greyfell dying before finding a mate implies that mythical animals die of old age, even if they're
Long-Lived.) It would be quite the cop-out if something that impactful the elves have been working for millennia to prevent happens offscreen.
Maybe the gorgodon problem is resolved by the Neverseen conveniently having more stashed away somewhere, or the protagonists finding a way to create more. Or maybe the Timeline to Extinction turns out to be another baseless superstition, like Shades being untrustworthy or multiple births being unlucky. Consider the narrative, though. So far, all of the other intelligent species have had A Day in the Limelight when the Neverseen's plans involved them. (Ogres and gnomes in Neverseen, goblins in Lodestar, trolls in Flashback, dwarves in Legacy, and humans probably in Stellarlune since Keefe's going to their cities.) It would be quite the Grand Finale if the Neverseen caused a planet-wide catastrophe that threatened all species, forcing them to team up to survive, and allowing characters Put on a Bus like Tarina to return for the finale.
