It was a normal day in Equestria. No avatars of the night trying to steal the sun, no beings of pure chaos messing things up for everyone, no changeling queen trying to steal the love of the whole country. Well, there was one thing... as the whole world got up for the morning, they noticed something very off about the sky. It was completely empty. Not in a state of eternal night like what people thought originally, blaming Princess Luna again. But, the light from the sun was still shining, even though the sun was nowhere in sight. Both Princesses tried moving their each respective celestial bodies, and even though they could not be seen, they could sense their magic, and still somehow move them.
And so all of Equestria was in a state on the verge of panic, even though the sun and moon were changing the light cycle, no other problems occurred, crops still grew, weather still changed, and this went on for about a week until a certain wanting-to-be wonderbolt, Rainbow Dash, tried flying into it. Now she expected to just break through and save the sky, and well... that didn't work out so well. As she flied, the darkness returned the favor, and reached out of the air and struck her down. Now no damage was harmed to her, as it was not a heavy blow, but it was enough to knock her off balance, and she fell quite a bit before she regained it. Everyone after that was more wary of the darkness in the sky.
On the thirteenth day of the pitch black skies, a royal guard noticed that the horizon had changed. Back to normal. Not the whole sky, but small slivers around the mountains. He reported his findings to the captain of the guard, who reported it to all three princesses, as they were all there. The princesses were happy to hear the news, meaning that perhaps this would all just... go away in time. As the darkness thinned around the horizon, quite a few noticed that it was centered over Everfree Forest, and was falling down towards it.
This realization, is that, the parts that were removing from the skies, were concentrating over the Everfree. Now some ponies were concerned that someone was casting some sort of spell that caused this, letting a powerful being enter this world to wreak havoc. Zecora was contacted by Twilight Sparkle to see if anypony was found in the forest, but she reported none. As the sky returned, the shadow slowly formed a giant orb over Everfree Forest, and there it sat for three days, until it started to move. Orb to diamond, diamond to spikes, spikes, to a pair of wings, wings to orb. And so it repeated for another week, shifting its form every second of it.
Until, it started forming center, and concentrating even more, forming a mixture of all four shapes, and somewhat resembling a figure. The only photo that could be found of the figure before it fell into the darkness of the forest, showed a large pony, with the antlers of an elk, the horns of both a kirin and a unicorn, four pairs of wings, one bird, one clear like an insect, and six legs, all with a strange pointed end, and with no colors but the darkness of the sky, except its eyes, which were the colors of pure light. The photo however was very shaky, and was taken from far away, so as far as anypony knew, this photo could be fake.
But afterwards, everyone could feel it. Pain, sorrow, unlike anything they had ever felt from any source, not even Nightmare Moon could compare to the pain whatever it felt was experiencing. Everfree Forest was no longer entered for another reason, and anyone who passed could feel the burden of it.