I'm not entirely sure specifically what 'blot worm fanfic' is about as it could be a very niche or newly created concept. It might be a fan - created fictional story related to some sort of 'blot worm' which could be a unique creature in a particular fictional universe, perhaps from a game, book or someone's wild imagination.
You could start by looking on fan - fiction websites. Platforms like Archive of Our Own or FanFiction.net often host a wide variety of fan - created works. Just use the search function and type in 'blot worm fanfic' to see if there are any available stories.
Collagen worm fanfic is rather an unusual term. It could potentially be a fan - written story about a fictional entity named 'collagen worm'. In fanfic, people often take an existing idea or character and expand on it in creative ways. So perhaps in this 'collagen worm fanfic', the author is exploring the nature of the collagen worm, its habitat, its interactions with other beings, and creating a whole new world or story around it. However, since we don't have more information, it's difficult to be more precise.
A 'catnip worm fanfic' could be a piece of fan - created fiction that involves catnip and worms in some way. Maybe it's a story where a worm has an encounter with catnip, or perhaps there are characters in a fictional world who are affected by catnip and there are worms involved in the plot. It really depends on the creativity of the fanfic writer.
Complementary worm fanfic could refer to fan - created fictional works related to something called 'worm'. It might be stories that complement the existing 'worm' - related universe, perhaps by exploring different aspects of the characters, events or concepts within it. For example, it could expand on the backstories of certain characters that were not fully explored in the original 'worm' work.
A banshee worm fanfic is a piece of fan - created fiction related to the concept of a 'banshee worm'. It could involve stories that explore the nature, origin, or adventures of this fictional banshee worm. Maybe it's set in a fantasy world where the banshee worm has special powers or is part of a complex ecosystem.
I'm not sure specifically as 'a phantom blot' is rather an unusual and not a very common term. It could potentially be a spooky bedtime story about a phantom or some kind of blot - like a strange mark or figure that has a mysterious presence in the story.
A simple way could be through a dimensional rift. A character from RWBY accidentally stumbles into the Worm universe or vice versa. Then they have to figure out how to get back while dealing with each other's worlds' problems.
Aquila worm is usually quite small but has a big heart. It might be weak physically but its determination is strong. For example, in some fanfics, it faces much larger predators but doesn't give up easily. It uses its wits to survive.
Alex in this fanfic could be a really unique character. Maybe Alex is a fan of both Equestria Girl and Worm, and through some magical or scientific accident, gets transported into a world that combines the two. It would be a wild adventure for Alex to navigate the different rules and cultures of both universes.