Stalking the shadows and learning your body's natural surroundings, you unlock something within that spreads throughout your form. The shadowy armor on your body dissolves in the darkness, smoldering with shadow as your glowing eyes fade out.
In any condition of illumination other than full daylight, you can blend into the shadows, giving you a circumstance bonus to Hide and Move Silently equal to your character level. Artificial illumination, even a light or continual flame spell, does not negate this ability, though a daylight spell does.