How powerful is an Alicorn?
Rumours say that ponies that become alicorns have unmatched power. But some say they are exactly the same as how they were before they transcended into power.
Ponies say that the Elements of Harmony are the most powerful creation in the world. and nothing can surpass their power. But what happens when this power isn't available?
Princess Luna soon soon puts that theory to the test when a mechanical being enters the world of Equestria.

This is a Oneshot, not a series.