Well, it varies depending on the specific story arcs and editions of the Locke and Key comic. You'd need to do a detailed count while reading to know for sure.
To be honest, I don't have the exact number off the top of my head. You might need to go through the comics carefully to keep track of all the keys. Different volumes and storylines feature different keys, so it's a bit complex to give a precise figure.
In a particular fanfiction, Lucy's keys start to glow in a strange way which leads her to an ancient prophecy. This story is interesting as it combines elements of magic from the Fairy Tail world with a unique storyline. It shows how Lucy uses her intelligence and the power of her keys to solve the mystery behind the prophecy.
I don't know who the author of this fanfiction is. There are so many fanfiction works out there, and without more context or research, it's difficult to determine the author.
I'm not sure specifically as there could be many interpretations. It might be about a character named Lucy obtaining all 12 keys in a fictional world. Maybe these keys are magical or important items that are crucial for a certain quest or storyline within the fanfiction.
In Fairy Tail fanfiction, the new keys might have a connection to an ancient magic. Maybe they were lost for centuries and now that Lucy has found them, she's unlocking a long - forgotten part of celestial magic. This could bring new allies or enemies to the Fairy Tail guild depending on who wants to control or use this newfound magic.
The length of a chapter varies according to the genre and author, but generally speaking, a chapter is between 1000 and 2500 words long.
The length of a novel also varies according to the genre and author, but generally speaking, the length of a novel is between 1 million to 2 million words.
It should be noted that these numbers are for reference only. The actual length may vary depending on the author, the editor, and other factors.