Altus Tunnel

The Altus Tunnel is a crystal mine in the middle of the Altus Plateau, south of the Minor Erdtree. Miners and marionette soldiers work its shafts, and the walls glitter with glintstone.

The boss is a pair of Crystalians, one with a spear and one with a ringblade. In a large cavern deeper inside, a Withered Astel, a malformed creature from the stars, drifts around, a hint of a much bigger version of it you meet elsewhere.