Twilight was laying in her room appreciating the decorations. Unlike on land, where things could be built in whatever shape the builder could make work (Thank you magic), builders down here didn't have that luxury. Here, in the depths, you had to work with what you could.
This means that the 'room' was more along the lines of a hole in the rock filled with moss and sponges to make it soft with some kelp to make sure a random current did not cause the occupant to drift away during the night. She drifted off while planning to add moss to her bed in Ponyville. It was very comfortable.
Midnight was currently sorting her memories in the dreamscape, mostly to prevent odd dreams due to the fact that she had gone to bed the evening of the day after reaching Coltlantis. She and Lyra had been dragged into a party which lasted a day and a half and some how resulted in King Leo winding up with his head stuck in a hole among other things. The only reason the party ended was because half the city was about to pass out.
This is not to say that the seaponies were insane. At least they were no more insane than some ponies on the land.
The first thing they did after greeting Twilight and Lyra was to rush them to a hospital. Things had gone fine for Lyra but Twilight had to explain both her general anatomy and calm down the doctors when she started developing purple spots. This was normally a sign of a rare but dangerous illness for the sea tribes. For her, it was much more mundane and slightly embarrassing.
While her body did not need fur (due to the fact she was made out of plants and woods), she tended to feel exposed without it. For this reason, she found a way for her body to grow purple moss to simulate having fur and cover up any thorns on her body. Once the doctors had put her through a battery of tests to prove that A. she was not sick and B. that the spots were, in fact, just purple moss, she was allowed to leave.
She ended up walking right into the middle of a party which would make Pinkie drool.
Twilight later found out Pinkie had been banned from having a party of this caliber while within city limits, but that's a story for another time.
Midnight had a good time meeting everypony. Some memorable encounters included Calliope and Harpsichord, a pair of kelpies who were keeping the younger party goers entertained. Harpsichord was, contrary to popular myth, male (though still very feminine in figure).
The next memorable encounter was a sea-stallion by the name of Sea Breeze, who was the head of the local chapter of a group called the Moon Children.
As the name implies they were a group who worshiped the moon and its effect on the ocean. Needless to say, their moon worship, by extension, included Luna herself.
Twilight answered a very large amount of questions involving her mare friend as calmly as she could. The final question turned out to be if the moon goddess was currently courting anypony.
Twilight's answer caused Sea Breeze to all but pick her up and drag her to meet the other Children being introduced as the consort of the Moon goddess. That was kind of nice oddly enough.
She spent the next few hours answering questions and telling stories of Nightmare and Celestia's adventures, including tales of Discord.
It took some prompting, but she went into some of her own exploits too.
The cult nearly had a conniption when she showed them a picture of Spectrum ( She kept it stored in glass and held it inside her barrel for safe keeping.) By the time she left to go to sleep, the scribes were hard at work updating their texts to include The Sun Goddess, Celestia in greater detail.
Their texts also now included The Chaos God, Discord, The Love Goddess, Cadence and last, but not least, Midnight, Consort of the Moon, Goddess of the Wild and father of Spectrum. the true Child of the Moon.
The next day, Palace of Kings
Midnight took a deep breath before checking the treaty once more. It was spelled out in legalese, but the gist of it was a rekindling of the tribal alliance between the sea and land tribes with all rights therein.
This, of course, included trade routes, non-aggression pacts and research cooperation. It also opened to door for any seafolk who wished to move inland to immigrate to the rivers and lakes of Equestria as long as they went through proper legal channels to avoid confrontation with nearby towns. The last thing any pony wanted was for a fisher to wind up injuring; or worse, killing; one of their new neighbors because they were unaware that somepony now lived in the area.
Well, everything looked in order. With her head held high Midnight entered the royal chamber ready for anything. The negotiations went much better than expected. Though they still took 3 days, most of this was spent making sure all the laws matched up and helping set up plans for eventual tourism.
Immigration was made legal between Equestria and Cotlantis. The King and his officials were aware that it was unlikely for a land pony to wish to move underwater, but they felt it was only right to offer.
Not to mention that their city was a legend made real. Even if ponies did not want to move there, being able to visit and see the city would draw the attention of academics and thrill seekers alike. The city council was thrilled at the prospect of new jobs and many ponies who had a talent for making utilizing or working with bubbles and those with good people skills were overjoyed at finally being able to find a new use for their skills.
The negotiations may have been swift, but helping set everything up and double checking safety measure to make sure things were safe for ponies who could not breath in the water took a bit longer. Midnight did not wind up leaving for three weeks. This was nice, however, the projected time for the tribe meetings had been a month minimum.
This meant for once she was ahead of schedule.
Midnight left with an escort of guards in case the leviathan followers wanted revenge. As she headed back to the surface, she started to speculate on what had happened while she was gone.