Chris Van Deelen

are incapable of finding water, they shrivel up and die.

These creatures have no use for any sort of treasure or artifacts, and because they don't have a particular lair or home which they return every day. As a result there is no chance of random treasure being found around them. Despite, or maybe because of their choice in living habitats, these creatures are completely immune to disease and poisons.

Mutations: Aberrant Form (natural weapons - claws, xenomorphism - amphibious), albino, bizarre appearance, chameleon epidermis, disease immunity, dermal poison slime (random class), increased sense (sight, smell), night vision, regeneration, toxic weapon.

Source: X-Files Season 2 Episode 'The Host' (1992)