Sucking light is exactly what shows just how powerful black holes are. They affect their surrondings so much that not even light, the fastest thing in the universe, can escape it. Also, a micro black hole is micrometers in size, and vanishes nearly instantly.
Her manipulation of darkness is simply creating a sphere of magical darkness around her. There really is no (canon) reason to believe she can do more than this.
I may not be a Physicist, as Engineers are always to be thought as little brothers of this kind, but...Actually, as you said again, I am referring to >micro black holes<. You realize that micro black holes are so minute that it only sucks light(or anything within that boundary) within a certain area(specifically volume as it is a 3-dimensional boundary surrounding the vacuum). That there are MANY speculations and theories that it is possible to create these micro black holes in Super Colliders(Like the most notabale place I've always dreamt working at; the Large Hadron Collider at Switzerland) that it >isn't enough< to destroy the fabric of space-time.
Should you realize, Mass = Force. Smaller mass = Smaller Force. Bigger Mass = Bigger Force. So no, micro black holes can't obliterate anyone bigger than it.
I made my point about black holes when it was first specified, but this time I said >micro black holes<
http://www.shrinemaiden.org/forum/index.php/topic,15367.msg1010538.html#msg1010538I never finished what I meant about her controlling a micro black hole. As I said, and you said again, they are relatively small and tend to disappear quickly. That means most probably she can manipulate multiples of these around her.
>Disclaimer: No, this is just what I want to to speculate on her ability in some way it is, so please don't take it the wrong way that I'm speculating her power in regards to canon.