After they had eaten, they withdrew into the solarium. A curious addition to a ship, but sensible for any that Celestia owned. No one else was in there, allowing Celestia and Silver to sit together in peace while bathed in the warm glow of the sun above.
"Are you ready?" She reached her wings, touching Silver on either side. Silver spread his own wings, the two brushing against one another and cementing the connection. He could feel her gently pulling at him from the inside, testing her ability to draw from his changed network. "Now, I imagine this will cause some... reaction within you, and I ask that you stay calm and still. We both need to stay in contact until the deed is done, for better or worse."
Silver nodded and started breathing in measured amounts, entering a state of relaxation. The sun felt nice on his fur, and Celestia's touch was gentle and kind. He was happy. Then the drawing began. As Celestia started the powerful magic, she tapped into Silver's reserves and began pulling, but that made it run all through him, and with the heart of his network being where it was, he was soon roused from his calm state to that of unsatisfied arousal.
He forcefully shoved the emotions aside, focusing on the peaceful place. The warmth, the quiet, and how much Celestia needed him, as a unicorn, not as a stallion. Though he squirmed lightly, he kept control enough to let her have her fill of his magic. Celestia's magic flared, but she hid it as sunlight, as if the solarium was simply reflecting dazzling rays as a glass building was likely to do anyway.
The wave spread out over the city, carried by the foal-seeking spell, though instead seeking those who had desired Silver's pain or death. That had been one of the more complex parts of the spell. They couldn't be too careful, lest they include some cat that thought he deserved a kick in the shin when Celestia wanted murderers and conspirators.
They both felt a sharp tingle. The spell had found its first target. Fireworks exploded over the cat's head in a modification of Trixie's spell, showing fangy displays of a lunar pony with little arrows and the words 'Murderer' flashing, but that was only the start. The seemingly-harmless display became horrifyingly real as the faux-ponies rushed at their target, sinking fangs into the likely surprised cat. Silver could feel his own fangs ache as their magic was tapped, and the feline was filled with abject horror. Silver fed through the connection, the taste of blood filled his mouth without an actual fluid as he drained first one cat, then another, and soon entire groups. Celestia siphoned off the magic as it become available, fueling the spell's rapid expansion.
Silver hadn't cast the spell, but it felt almost as good to fuel and draw from it. His arousal was almost forgotten in favor of the sweet taste of revenge as he left each cat to collapse where they had once stood or sat. Some would likely perish from a combination of terror and magic anemia, but most would live to spread the tale of the revenge of the night. There was a sudden thump just outside the solarium as a worker thudded against the glass and fell, being bitten wildly by spectral lunar ponies. Silver grit his teeth. "So they had an agent that close?"
Celestia nodded, but kept her focus on the spell. It washed out over the far reaches of the city, though it seemed to have passed over the majority of its targets. The final part of the spell was upon them, and they both tensed at the power required. Every drained cat was branded across the forehead with a symbol they had found in Amenti's book, an old symbol for treachery.
Silver suddenly spasmed as he came on the spot, spraying the ground under himself with sticky fluids and losing control. The spell faded and collapsed, and Silver was allowed to fall onto his side, panting for breath.
Celestia rose to her hooves gracefully and pet Silver once with a wing before moving out to check on the one they had caught so close. "You did well."
Three of the twelve cats that were working on the ship were branded. They were gathered up and tossed off the ship without further reprisal, and their work was double-checked by the others, revealing a few questionable repairs that would have caused trouble later. The dockmaster took note of each. "Their guilds will be informed of this. They'll pay for besmirching the good name of the Catro Docks. A thousand apologies, Sun Princess." He tipped his hat and went along his way.
When all the formalities were completed, Celestia made a show of shock at the magical events, feigning no knowledge of them or how they came to be. Most seemed eager to lay the blame on Silver. "What a truly terrifying stallion! I didn't know he was such a powerful wizard."
Rumor spread through the city. Though Silver expected to be shunned and hated, instead he received many gifts and letters from would-be fans that sought to earn his favor, to say nothing of the considerable amount of letters from cats ready to share much more intimate company with him, and not all of those female. Silver didn't get it. "I'm a star?"
"Silver Stars," said Shei with a grin.
Silver snorted at her. "Well, yes, but why are they so... happy about this?"
Shei moved up to Silver and kissed him suddenly, silencing him for a precious moment in the exchange. "Never change, master. Power is attractive, and you just displayed tremendous power, despite being injured, and yet you showed mercy. I heard very few of those attacked were actually hurt seriously. You are a god compared to most, and you still look at me with those innocent eyes." She cupped his face in her hooves. "Never change."
Aila rolled her eyes. "Don't encourage him. He should learn to wear his princedom with some dignity. The people think you're sexy because they imagine a powerful and dread lord of the night. If they knew the truth the illusion would break soon enough." She snatched up one of the candies laying in a basket for Silver and chewed it without regret. "Enjoy it while it lasts, master."
A small part of himself considered taking up those femcats on their offer, but he decided against it, and redirected that feeling towards Aila. "I think you've been badmouthing me enough. Time to discipline you."
Aila rolled her ears back and scowled at him. "You don't have the balls."
Silver walked towards her purposefully. "Oh you'll see that I do, once I'm buried in you up to them. Now don't run away or I'll have to punish you all the harder."
And the game was on. Aila enjoyed being chased, and held down. She cursed and she struggled, spit and fought, but she never said the safeword, and eventually the two were brought to ecstatic heights in one another's struggling grasp. As they lay there, cooling from their bout, Aila jabbed him with her words. "So you've abandoned your wives?"
Silver bit her on the ear. "Don't try to confuse me. You're my concubine, mine to do with as I please, wives or not." He thrust firmly into her. "And a mighty fine mare you are, when you aren't trying to attack me with that razor tongue of yours."
Shei approached quietly despite her size. Silver didn't know she was there until she licked him around his bracelet. "I apologize for interrupting. I've been a naughty mare too. Perhaps you should... punish me too?"
Silver quickly caught on and gently dismounted from Aila. "You two may be sisters, but you're not the same. You don't have to play Aila's role to get my attention." He nuzzled into her cheek. "I like you just the way you are." Whispering gently, he added, "And we can skip to the part you want without the chasing or punishing."
The day left Silver's injuries a bit sore, but he found it quite worth the effort. But thinking back on that made him curious, and he peeked inside. His net was looking surprisingly better, but he wasn't sure why. He trotted around the ship until he found Celestia and he asked her about it.
Celestia smiled with that knowing look. "The sun does have some healing properties. The flow of energy was hardly one-way. Perhaps some of my magic running through your body helped get you back together that much faster? I never tried just filling a pony with my energy without a specific purpose, and when I did share, they were usually in prime condition."
Silver nodded slowly. "Well that's fantastic. Why don't we do it again until it's all healed?"
Celestia tapped Silver on the nose. "Tempting, but if I just flood you without a purpose... I'm uncertain, but I feel I could undo my sister's work, and she would be furious with the both of us. I could be wrong about this. I really don't know, but I don't want to chance it. How are you feeling?"
Silver didn't wince with a flex, and that was a huge improvement. He smiled at her and nodded. "I'm good enough. A few more days should have me right way up, then we can see about other things. When do we weigh anchor?"
Celestia waved at the working ponies and cats. "Three days. Are you upset? They're calling you the Terror of the Night now."
Silver tilted his head. "They say that with smiles. I'm like... a hero, a dark hero. You... should see some of the letters they sent. Even the girls seem happy about the whole thing. I'm not sure how to take it all, but I'm definitely not an outcast."
Celestia looked Silver over a moment. "Mmm, I suppose it worked out for the best then. I'm afraid they wouldn't see it the same way if they knew it was my magic at the helm, driving the revenge across their city. Let's appreciate this good turn. Your reputation will benefit from this... I wish we didn't have to actually... Kill, again."
What could Silver say to that? He didn't really feel bad about what he'd participated in, but he could see Celestia was clearly bothered by it. He tried Aila's tact. "You should be punished." Celestia blinked at him with confusion. "Yes, go directly to your room. I'll be in there in just a minute to discipline you. Use that time to consider what you've done and how I should take it out on your delicious flank."
Celestia took a timid step away before trotting off in the direction of her room, looking perplexed, but curious.
Silver arrived in her room to find her naked of her usual jewelry, sprawled out across her bed and gazing directly at him. "How do you propose to punish me, my husband?"
Silver retrieved a large brush from a drawer in his mouth and carried it over to Celestia. "First that sun of yours needs to be pinkened. Every yelp will get you two more swats. We'll start with five." He brought down the brush, slapping across Celestia's generous bottom and drawing a surprised yelp from her. "Oops, two more for you, one down, six to go, my naughty mare."
In the end, they never did breed, but Silver's eager but awkward dom play seemed to bring some satisfaction to Celestia, and when they retired to bed, they did so in one another's embrace, each happy to be loved by the other.