Undergoing heavy rewrites: thank you for your understanding

Equestria is drained of magic. Unicorns can barely levitate, pegasi find themselves straining to move clouds and fly. Earth ponies are weak, and their growth is far less than normal. they are all cursed, such that no pony can go near any other pony not of their own kind.

And it is slowly failing. What remains decays, the magic too thin to continue on. Equestria has one last chance to find harmony, or it will die, and the magic will be gone. It will be hard, almost impossible really, a fool's errand if not for the grave importance of the task.

Six mares are the only ones who can help. And they can do it, should they try. there is really only one problem;

Nopony knows about the decay. Nopony chose those mares but destiny. They need to accomplish a task without knowing it, how to do it, or even that it is something that needs to be done. And they must:

Or everypony will find death when the magic finally fades.

A hag: someone with the power of nature, to use as they see fit. Sacrifice, and deals, power at a price, and more defines them. It is a hard thing to be a hag, and a harder thing to deal with them.

So when one of them, old and only partly wise arrives in a land that has no hags, she is confused. Lost. Upset. She does not know Equestria, and makes assumptions that are not wrong...

But not wrong doesn't mean right. It only means that you might be able to understand how the assumption could be considered correct. So, how will the hag deal with Equestria? A friend? An ally? An enemy? Its doom? Any of the above, willing or unwilling, knowing or not knowing? Everypony has their own opinion. Time to see who is right.

Some creatures have intelligence in a body like an animal. a few of these creatures are rarely capable of speech, and learning. Only the rarest have magic, or an ability of magic. Ponies are a good example of the rarest.

There are others though, and when one of them finds himself in Equestria with no memories and only knowledge, he is very lost. What will become of the beast that can manipulate time? Will he become an enemy, an ally, or something else, as he has no real control over his ability.

Time is fairly malleable. Tough, capable of changes without deviation even from past ripples. That is... very fortunate. Or maybe change might be for the better. Only time would tell, but it might not have much of a choice in the matter anymore.

Light. A good thing. The sun, the stars, the moon, shining bright and powerful, lighting the way for life to progress. Good things are often called bright, hope is viewed as the light at the end of the tunnel. Darkness. A bad thing, if not evil, then sinister. Hidden places, nightmares in the dark, monsters lurking where they are hidden. Dark hearts, dark thoughts, evil things. The absence of light. All of this is true.

However, light can burn, or blind. And darkness can save, cloaking you to hide you from enemies. Where roles are reversed, and what was good becomes bad by sheer purity, and what was bad become good due to use. Light and darkness are not good and evil. They might err toward their respective morality, but they are not good and evil.

Equestria was taken by darkness a long time ago. What little light is left is barely enough. But it is a time when not all is right. Not everything is known, or understood. When good and evil blur together, and every action cannot be known to be correct. Can the world be saved? And if so, from what?