Disclaimer: I do not own Middle-Earth or any of Tolkien's characters. I just make them do cute things for my own amusement.
What Varda didn't tell the elves about the making of the Valacirca...
This was inspired by a rejected plot twist from the Lost Tales.
"I'm an engineer, not a biologist. For your information, Yavanna herself couldn't design a truly intelligent neural network."
"I asked you to provide an army, Sauron. When the Children wake..."
"Then you shall have your army. I have some plans and designs you will undoubtedly find amusing. Unless you care to provide me with some spirits sooner?"
"I have more important matters to attend to." Morgoth broke off the mental contact and sent his awareness over every inch of Utumno, checking his supplies and defenses. Everything was in readiness, just like it had been the last thousand times he'd checked.
Aulë tried to think of something they'd missed, some preparation that hadn't been made. There was nothing more that could be done until the Children woke. Fortunately, he was behind on his everyday tasks. He melted some silver and poured it into a mold.
Soon the sickle was ready to be removed from the mold; now the real work began. The edge must be keener and the metal stronger and smoother. He would shape it to perfection; it was, after all, for Yavanna.
Despite his focus on his work (and wife), Aulë heard, identified, and chose to ignore the mental voice.
"Finish your wife's sickle, then. I didn't think I was interrupting anything important." Morgoth added a mental image to clarify his definition of importance.
"Yavanna would never do that!"
"Not with you, perhaps. Shall I show you what manner of comfort she sought from Manwë after you made the dwarves?"
"Liar!" his hammer came down too hard, shattering the sickle.
"Lies are rather entertaining and often useful."
Aulë had just picked up the silver fragments when Yavanna walked in. "What happened?"
"My hammer slipped."
"Your hammer doesn't just slip." Reluctantly, he told her of the conversation with Morgoth. "He what?!?"
Varda was walking, trying to think of new ideas for constellations. A butterfly flew past; she'd used that idea already. Perhaps the Trees? She went to them, watched the mingling of the lights, then decided that it would take too many stars to do the job right. Yavanna was good at coming up with forms; perhaps she'd have an idea. That's when she saw Yavanna. "What's the matter?"
"Melkor was telling Aulë lies about me."
"As if Aulë believes or cares what he says!"
"He doesn't believe but he does care, as do I."
"His lies aren't worth caring about it. I'd ignore anything he said about me or Manwë."
"What about me and Manwë?"
"He what?!?"
Varda arranged the seven fragments on the grass. "Yes. That will do nicely. I'll call it the Valacirca"
"So, did your little joke produce any further effects?"
"Not unless you count Varda wanting me to look at her newest stars."
"You mean the ones she made with silver cores?"
"She what?!?"