Daughter of the Alicorns 4: Battle for the Crown

Beyond the past

I decided to place Rainbow dash in charge. She was a candidate. Of course. Aria and I went to twilight's library. To find a relic book, I did a magic sort. I got like 142 books on the subject.
Alicorn amulet
Magic jewels
Magic relics...
I dove fore the magic relics book. I turned the page.
"Find anything?" Aria said with a worried look.
"Hmmm. Maybe Celestia's journal has a bit of info on the subject. I grabbed the book from a nearby shelf and opened the bronze leather cover.  I of course kept the journal. I thought it would be useful in finding things.
My sister held most Alicorn power in the crown she gave her daughter. If only it saved them. It disippeared in the kingdom I believe...
I put down the book.
A spark lit up bringing an idea into my head.
"Aria! You had a crown!" I yelled standing up.
"It's in the kingdom but it disippeared." She said sadly
"Wait we could use the map! Twilight's map." I suggested as Aria nodded.
My heart pounded as me and Aria flew to the throne room. The map was there in the middle of the room.
"Aria turn on the map."
"Ok snow."
As the map flashed on in a rainbow of colored crystal Aria's Eyes widened.
"Woah! Look at this snow diamond!" Aria said excitedly pointing her hoof at the map. It was a blank area near the edges of Equestria.
"Aria that's just a blank space." I said.
"You don't see this giant ruin. Of castle?" She asked confused.
I thought about it for a second. The kindom disappeared... It was invisible to the naked eye!
"Aria it's invisible! You can see it on the map! you must be the key to bringing it back!" I exclaimed.
"The sirens would have counted on me returning the kingdom to normal. That explains the kidnapping." She shrugged.
"How are we supposed to find it exactly?" I asked slowly then a voice broke the short silence.
"I think we can help."