Chrysalis - Chapter 1433: Visions of Sickness

... rd down meant all Krath, to some extent, slept with one eye open.

Literally.

It wasn't that hard, once you learned the trick. Most young slugs born in the tribes learned it before they'd lived their first year. Those who didn't were far less likely to reach that milestone. Even away from his people and out in the Dungeon, Zluth was in no position to relax his guard. Many scouts had been taken by invasive parasites in their sleep, and he wasn't about to allow himself to be counted ...