Good character development in both the Doctor and the Tardis is key. If a fanfic delves into the Doctor's past experiences with the Tardis and how it has shaped him, and at the same time shows the Tardis evolving in some way, it's bound to be great. For instance, the Tardis could develop new functions based on the Doctor's needs over time. Also, a vivid description of the Tardis' interior and how it feels to be inside it can really make a fanfic stand out.
Since I don't have first - hand knowledge of this fanfic, my best guess is that it could involve a situation or concept that is more 'blue' in nature compared to the TARDIS. Maybe it has to do with a different kind of blue - hued alien or a blue - tinted dimension that is explored in the story. It could also be a play on words, where 'bluer' refers to something other than the color, like a 'bluer' state of mind, and the story then weaves this concept in relation to the TARDIS, perhaps showing how this 'bluer' thing interacts with or is different from the TARDIS.
I'm not sure specifically as I haven't read this fanfic. But generally, if Harry is related to the TARDIS in a fanfic, it might involve some sort of crossover where Harry from the Harry Potter universe has an encounter or connection with the TARDIS from Doctor Who. It could be a really creative take on combining two very different fictional worlds.
The concept of time is also treated differently in this type of fanfiction. While the Time - Turner in Harry Potter allows for a limited form of time travel, the TARDIS can travel through all of time and space. Fanfiction writers often explore how these two different time - traveling mechanisms interact. They might have the TARDIS enhance the power of the Time - Turner or use the Time - Turner to fix a problem within the TARDIS's time - space continuum. This exploration of time adds a whole new layer of complexity and uniqueness to the stories.
One interesting plotline could be Clara discovers a hidden chamber inside the TARDIS that contains secrets about the Doctor's past. Maybe it holds memories or artifacts that the Doctor has long forgotten or tried to keep hidden.
The representatives of the small court stage climbed to the top of the Dai Luo Peak and worshipped Manjushri. It was equivalent to a chance to worship the top of five platforms.
IDW means Idea and Design Works. This company has made a name for itself by publishing comics that appeal to a wide range of readers. They often collaborate with established creators and license popular properties to create engaging comic content.