The episode received generally positive reviews for its world-building and the surprising introduction of mecha elements into the post-apocalyptic setting.

Kaina of the Great Snow Sea - Episode 9 discussion : r/anime Streams * Crunchyroll. * VRV. Reddit·r/anime

The climax of the episode reveals a massive, ancient mechanical superweapon—referred to as the Builder or Architect—which Valghia unleashes against Atland. Audience and Critical Reception