Elusive Mecenaic

Some mecenaic settlements are in areas with unusually high populations of predators, even for Xofirth. Like many other mecenaics in those areas, you had to rely on your elusive instincts during your formative life stage. Those instincts have stuck with you all your life. You can use your shell to Hide without any cover or concealment from creatures that don't realize you're alive. If you succeed, onlookers still see you, but they mistake you for an inanimate shell. After being fooled once, they realize you're alive, and you can't Hide from them in that way again.