A mngwa exists only at night, appearing at sunset and fading away at sunrise. It receives the benefit of a heal spell (CL 15th) each night when it reappears. A mngwa's connection to darkness is so strong that it has sunlight powerlessness even within the effects of a daylight spell. However, a daylight spell that affects a mngwa loses 10 minutes of duration for each round it affects a mngwa in this way.