Marshie and Marshie alone are immune to body alteration, both positive and negative. They can also glide, and sneak by silently. but there's no 'magic'aside from their resistive properties.

alone, the god that hovers above them give them a little more options

Yet, when the Gold Garments they possess get closer proximity o each other, things start to happen. Still weak, though!! but that can give another idea~