Jack of Harts

The Arnam are of course optimized for cool and wet environments. The corollary to that is that they are supremely unsuited for desert environments. Their skin may be dark, but the pigment is for camouflage, not protecting from the sun. A fierce, desert noonday sun can kill an Arnam if it does not find shade. And the dry environment will quickly sap needed moisture out of their body. Arnam visiting such environments must cover themselves from head to toe, and use misters constantly to keep them from dehydrating. It is unsurprising that they consider such environments to be hostile, and they avoid such places whenever possible.