This instinct's origins come from deep within the Depths where many creatures call the crags and stalagmites/stalactites home. For the zilnae, such places are a haven of food, but pose a danger of stone-dweller termites. These pests, much like their wood dwelling cousins, make their home in stone.

In equal similarity, their presence within a zilnae rook poses a distinct risk of collapse. Getting rid of an infestation is a difficult and long process, and always runs the risk of painful, poisonous stings. Without quick treatment, these stings can cause various issues, but are rarely lethal.