https://mynoise.net/noiseMachines.php
MyNoise has a lot of sounds and sliders that usually have special names for the sound they make.
>but I need to describe it in a negative sounding way that sort of invokes a sense of fear.
Blood
Gotta admit, nothing there really sticks out, but that's mostly because it doesn't provide much detail to work with. Who are the kids? What are the stakes? What the villain's motivations? What tone does the story follow, and what themes does it touch on? It's hard for the potential audience to gauge interest without more context. Think of the pitch you want to give right now as the synopsis on the dust jacket of a novel. Include everything that makes your idea different and intriguing while keeping it concise, ~500 words, ideally even less.
Here is an article about writing a novel synopsis to pitch to agents, much of the information can be repurposed for this. (Proper punctuation and paragraph usage is a must to maintain clarity!)
Remember, it's all about what makes your story different. If someone looks at the given pitch and wonders if this is Voltron, Miraculous Ladybug, or Sailor Moon, then it needs to be more specific. With all that in mind, could you describe the idea again? Admittedly, I've gotten myself curious while typing this up :)
I second TwoTheVictor's suggestion of using Save The Cat as a model. There is a book written by Jessica Brody which is a fun read and goes into specifics of how to use the Save The Cat structure when writing a novel. Lots of good advice in there and a fun read.
https://www.amazon.com/Save-Cat-Writes-Novel-Writing/dp/0399579745/
Here is a place you can start. This series is great. This particular book has a lot of descriptions to help with characters who have addictive personalities (i.e. As addicts do). Best of all the page you need just happens to be shown in the Look Inside Amazon feature. Scroll down until you get to the page 46 example.
I think this could be useful: https://www.amazon.com/Emotion-Thesaurus-Writers-Character-Expression/dp/1475004958
There are others in the series that also could be very helpful.
This series of books can help with ideas and can get you started or unstuck. That said if you are writing a first draft then you may not want to bother with anything that interrupts your flow and worry about such things on edits.
Strunk & White. Very short, very clear, the only grammar/composition book you'll ever need. Can't recommend it enough.
https://www.amazon.com/Elements-Style-Fourth-William-Strunk/dp/020530902X
I have trouble with both identifying and expressing emotions, bought this book and it has helped me: https://www.amazon.com/Emotion-Thesaurus-Writers-Character-Expression/dp/0999296345 I'm sure there are some other resources (maybe even free) online.
This was my second novel. I was trying to write something fun but uniquely American. It follows my character Gary, who plays college football and is pretty good at it. I published in in the early seventies so there’s a lot of Cold War references. People have called it postmodern but I don’t subscribe to that label myself. https://www.amazon.com/End-Zone-Don-DeLillo/dp/0140085688/ref=mp_s_a_1_1?crid=2FX08GNS9UAWY&keywords=don+delillo+endzone&qid=1660931782&sprefix=don+delillo+endzone%2Caps%2C64&sr=8-1
I had a problem getting all of my ideas together and organized! I created a workbook in order to help myself keep everything organized. I found that filling out the workbook often gave me new ideas that helped fill in plot holes and tie everything together! For my latest Novel I actually started from the end and worked backwards! This way you know the outcome and as you work backwards you figure out what needs to happen to reach that outcome!
https://www.amazon.com/dp/B09ZCYPFCT/ref=cm_sw_r_awdo_KQK3HWHCVDPWGWX6BZNW