Author's Notes:

So the song that is in the story is linked here in the story. The first and the second song are by the same artist "Eurielle. I love listening to them while I am writing.

First song - "Eurielle by Eurielle"
The second song - Carry me by Eurielle
Third song - Lullaby by Secret garden ( that is what the youtube video has. If anyone knows the real artist let me know

(Song link https://www.youtube.com/watch?v=wFzyU5bMPJI)

(https://www.youtube.com/watch?v=vyn8gAYtNu4) (https://www.youtube.com/watch?v=m2xnPSRSSzU)

Selene was sitting on the rock as she could hear ponies above her walking around. Her eyes glanced up and noticed that the sun was setting allowing the night to enter the world. She let a sigh escape her lips as she sent what little magic she had left out trying to find out where she was. As she felt her magic spread she felt something familiar to her. It was something she had only felt when she was around Twilight. Glancing towards the door she noticed it was cracked a bit. She smiled as she sat up taking a deep breath in as her gills opened up.

She allowed her song to be carried by sonar as she used her voice to sing the song hoping it could be heard over the music that filled her ears. Above her was a ballroom filled with ponies chatting about and enjoying the Crystal castle. Some of the staff had fixed some dishes that were supposed to be long forgotten. Twilight stood in the corner watching as ponies as they mingle. Krill and Skelly were enjoying themselves as they smiled and talked. Celestia was busy talking with Shining Armor and his parents. Twilight looked towards her drink as her ears caught the sound of the song. Dropping the cup she walked out of the room. Krill and Skelly stopped talking as their ears also caught the song. Celestia noticed and watched them.

“Twilight?” Celestia spoke up as she watched her student leave the room. The ponies around started to whisper as Skelly and Krill left the room as well. Watching them Celestia stood up and followed them into the throne room. Shining armor and his parents watched as Twilight was acting weird. Once they all entered the throne room they noticed Twilight was staring up at the ceiling.

“Auntie?” Cadence turned her head towards her aunts.

“Twilight” her parents spoke up.

Twilight moved to the middle of the throne room tapping the shell she had hidden under her dress. She allowed her tail to appear as she sat upon it. She spread her fins out to keep her balance. She closed her eyes as Krill and Skelly sat in silence humming to the song. Twilight started to mumble something under her breath as she quickly allowed the spell to fade around her. Most of them were staring at her unable to say something as Twilight opened her eyes staring down a hall. She quickly bolted from the room with Skelly and Krill following her. snapping out of their thoughts Shining and the others followed her as well.

“I know the songs she singing. Their old songs dated back to the alicorn Atlas the first king of the sea!” Krill shouted as Skelly looked towards him.

“Are you sure?”

“Yes! How many merponies do you know can sing with sonar still?” Krill shouted as he almost crashed into Twilight as she stopped in the middle of the hall. Her song had faded causing Twilight to look around panicking. She had three halls in front of her and she didn’t know which one to run down. Shining armor and the others were breathing heavily as they looked towards Twilight.

“Twilley what is wrong” Shining spoke up. His sister kept her eyes on the halls as she took a deep breath.

“Keep Singing!” she shouted in the halls hoping it would work.

“Twilight who are you?” Celestia was cut off as Twilight’s ears went up and she went down another hall.

Twilight smiled as she started down the hall again. The others had to chase her calling her name as she turned the halls listening to the song.

Selene had stopped singing as her voice was getting sore. Her ears perked up as she heard the door opening causing her to glance behind her. She noticed Twilight was standing at the top of the stairs breathing heavily. Her eyes were locked with Selene as she went running down the stairs towards Selene. Twilight pulled Selene into her hooves as she hugged her tight. Selene nuzzled Twilight as she closed her eyes leaning into the unicorn. Her magic had faded out as she leaned against Twilight.

“Selene?” Twilight moved her a bit.

“Twilight? Is that you” Star’s voice was soft as Twilight nodded.

“Star?”

“She needs rest at treatment” Twilight sighed as she kept the merpony in her hooves.

“Princess!” Krill and Skelly shouted as they ran towards Twilight. The others ran into the room stopping short when they saw Twilight holding Selene. Celestia and Luna walked up slowly as Cadence stood their shocked thinking the worse. Shining Armor stayed near Cadence as they watched in silence. Skelly leaned in towards Selene moving her gills. She could feel her breathing softly as she noticed her gills were a very light pink almost white.

“Krill we need to get her to Kibby now” Skelly looked up as Krill tilted his head.

“How bad are her gills?

“Almost white” she sighed as Twilight glanced towards them. Krill looked up towards the solar princess noticing her eyes were staring at the collar around her neck.

“Celestia we need to get her to a healer. We know of one in Sanctuary” he was holding his breath as Celestia nodded. She was silent as the mask she was wearing broke allowing her anger to show. She leaned down towards the collar while her magic flared. She used a quick unlocking spell as she pulled the collar from her neck.

“Sister, can you track the owner?” She handed the collar over as Luna nodded.

“Of course” she smiled as she left the room. Celestia turned her head around and noticed the tag on Selene’s ear. She caused the tag to turn to dust as she looked towards her sister.

“Take her to the healer and come find us when your done” Celestia let her breath out as Skelly nodded. She gathered around Twilight pulling her book into her hooves opening it up.

“Hold your breath” she smiled before closing her eyes as she started to chant causing the floor to boil. It wrapped around them pulling Twilight and Krill into the floor causing their vision to turn dark. It was a short trip as the shadows moved allowing them to see the room they appeared in. Looking around Twilight noticed the ceiling was decorated with merpony silhouettes swimming around as coral lights hung from the vaulted ceiling with a skylight in the middle. The walls were a dark blue tile as the floor was white marble with a large warm salted pool to their right while tables and chairs sat to their left. A large waterbed was in front of them piled high with pillows and blankets. Potions were set up around the bed as a tall light mint green merpony with a dark grass green tail. Her lime green and yellow mane hide her silver-green eyes as she sat next to the bed. Her hooves were mixing the potions as she looked towards Selene. Skelly closed her book as she looked towards the merpony.

“Sorry, Kibby. I would have teleported us into the main room but everypony was asleep” Skelly looked towards the pony as she nodded. Twilight moved Selene towards the bed as Kibby glanced towards every pony else in the room.

“It’s fine just give me a little more of a warning though” she smiled as she looked towards Selene and Twilight.

“Skelly can you and Krill get the guest room ready.” She waved her hoof as she set the two ponies out of the room. Kibby stretched her hooves as she placed a large saline bag on the nearby lamp before placing a line into Selene causing her to move a bit. Glancing over the merpony she moved her gills sighing softy. She spread her fins out as she took a deep breath in allowing her to focus her magic. Her fins started to glow a light blue as she ran her hooves along Selene’s body.

“Is there anything wrong?” Twilight spoke up as she looked towards the merpony in front of her.

“Her body has spent too much time in freshwater and not enough in saltwater. Merponies can regulate their bodies depending on what type of water they are in with the help of their magic. Her magic is to deplete to keep that function going. Her swim bladder is slowly healing but the medicine that she has been given is doing more harm than good. She needs rest and she is a month along” Kibby moved her hooves back as she closed her fins. Her eyes glanced towards the bottles pulling them close as she started to pick them up one by one “ She will need about a week of heavy treatment.” She started pouring different bottles into a small bowl. Once she had the bowl filled she moved towards Selene and started to work on her. She was silent as she moved from Selene’s body towards her tail. She took her time as she was removing sections of scales while she was rubbing the potion in. Twilight looked towards the merpony as she was working on Selene’s tail.

“Do you need me to help? It looks painful for Selene” Twilight glanced towards the merpony causing her to look up.

“This will be painful for her. She has a mate” Kibby held up three purple scales “Only a mate can do this without pain” Twilight looked towards the scales.

“What considers a mate for a merpony?”

“Oh, you half to change colors. Why?” Kibby looked up and noticed the pony was smiling.

“Those are mine” Twilight watched as Kibby jumped.

“Well good this can go a lot quicker than. Just find the broken scales and pull them off. I will fix a blanket up to place over her tail.” Kibby walked away as Twilight nodded.

“So I never did ask her but is the gem on her back supposed to glow?” her voice broke the silence causing Kibby walking towards her. She looked over Selene’s back as she sat there in shock.

“Oh, that is a sea gem. Oh this is”

“Her name is Selene” Twilight spit out a scale noticing the healer was breathing heavily.

“Oh, the princess has become the queen. I need to tell Skelly. But to answer your question yes it is. It means her magic is dangerously low right now and needs to heal. While you are pulling scales I am going to find Skelly” Kibby ran out of the room as Twilight finished pulling scales. She glanced down at Selene as she was resting in front of her. Twilight laid out beside her as she nuzzled up against the merpony. Twilight sighed as she pulled her shell off noticing small cracks forming along the middle where the gem sat. flipping the shell over she noticed the cracks were on the underside causing her to place it in front of her.

“You know with the queens magic running through you. I bet you won’t need that spell” Krill broke the silence as he walked in with a tray of hot tea. Twilight sat up and looked over at him her eyes widen.

“What oh no…I couldn’t my magic cannot work like that”

“If I am not mistaken you gave your friend butterfly wings?”

“I did”

“Listen Twilight I am just a historian for merponies in Maremuda and the sea kingdom of Squill. I know a lot about history as ponies may know but what they don’t know is that I am very proficient in merpony magic. My father was a surface pony and so was my loving grandmother. If you want to try just close your eyes. Use your magic and concentrate on the feeling you get when you tap the shell.” He looked towards her as she closed her eyes. She took a small breath as she flared her magic up. She thought about the feelings she had every time she used the shell. Letting the small breath go she opened her eyes as she felt the magic die down. Looking back she noticed her tail was longer and slimmer. Her fins were larger as her mane was draping around her. sitting up she pushed her mane back as she glanced around.

“Wow…my tail its longer than before” she glanced towards Krill as he smiled.

“You look like the first king Atlas.”

“Who is Atlas?” Twilight blinked as Krill was handing her some warm tea. He was glancing around noticing her gills making sure they were in the right order.

“Who is the first King Atlas? He was the alicorn of the sea, my dear. He was a rare sight as he could use his wings to fly but then he could use his wings to swim. He could go from land to sea without magic changing his tail to disappear. Though it is said that ponies were scared of his power and what he could do. They voiced their concerns to Celestia’s and Luna’s mother Faust. After so many court hours taken up from her because of the ponies she went and talked to him. He pulled his magic back making it where his wings stayed as fins. They weren’t satisfied with that. The ponies shouted their voice causing her to visit Atlas again. He once again pulled his magic back leaving his tail. Once again ponies were not satisfied. Faust went to visit him and he put his hoof down. He said that his ponies would no longer walk on land. They would take their secrets and stay in the sea till ponies were ready. So far that day has never come for us Twilight. We must use our magic to create legs allowing us to walk among the land. And your magic is strong. Keep the shell it shows your connected to royalty. Just don’t use the shell when you're in the water” Krill smiled as he started to walk out of the room “And I expect a paper miss Twilight” he had a grin on his face causing her to freeze in place “I’m joking Twilight. Goodnight Queen. Goodnight princess” he bowed before shutting the door behind him. Once she was finished with her tea Twilight placed her cup down letting out a small yawn. She laid out on her stomach nuzzling up to Selene as she wrapped her tail around Selene. She closed her eyes as she moved her head under Selene’s neck. As she fell asleep a smile formed on Selene’s muzzle.

It was a quiet night for both of them and it was peaceful. Twilight was the first one up as she let out a large yawn noticing the bottles that were in the room were gone. Glancing around she noticed that the sunroof was opened up a bit to allow the morning sun in causing the gems to sparkle in the rising light. Her eyes glanced around the sparkling blue tile as her ears twitched hearing the sounds of voices. Twilight glanced towards the door before turning around to Selene. Selene let out a small yawn as she winced a bit as she nuzzled into the pillow under her head. Leaning down Twilight kissed Selene causing her to smile.

“Good morning” Twilight whispered as Selene slowly opened her eye.

“This isn’t a dream?” her voice was barely there as she reached out and touched her. Selene pulled her down towards her and kissed her deeply.

“No this isn’t a dream my dear. but I half to get the others”

“No please can we just rest here together please” she whined as Twilight nodded.

“Selene?”

“I have never been in this much pain without Star. She always here beside me and helping me. It scares me Twilight” her voice was shaky as Twilight wrapped her hooves around her.

“It’s alright” Twilight nuzzled her as Selene smiled “Rest and we can deal with the princesses once your fully up to it” Twilight glanced down and watched as Selene had drifted back to sleep. Letting out a small yawn she placed her head against Selene’s before falling back to sleep.