Quick and Easy Questions (please read the OP)

[Demetri Malius]

If I want to do something such as travel along shadows, what power(s) would that require. As an example:

My character is moving along a city with lots of dark areas so I want them to be able to travel by shadow. They would be able to slink around places much easier than in full form, so long as they traveled along the shdaow of something else. They would appear on the surface as their own shadow, and that 2d shape can be hit. Granted I would need steath for this since its hiding my presence, but would I need something else such as phasing or elasticity/malleability?