1-18-3-1-14-21-13
 Solution document
> Overview Conclusion, Extra Terra, and more

Aer
Aqua
Ignis
Terra

Overview
 Given the non-linear nature of this weekly, the solution document will be separated into multiple parts where each element has a dedicated page, as well as the final step and some other extra stuffs.
 Puzzle answers, file names, and some other important texts will be shown in this format.

Inspirations

 The structure, the graphics, as well as the overall atmosphere of the weekly was heavily influenced by 12-9-12-9-21-13, A.K.A Lilium. This is also the reason why the title of the weekly is in A1Z26.
 Aqua was inspired by 11B X 1371, although I never managed to make the audio sound as good as he did.

The "weird" texts

 The texts on the intro image and Terra are not real langauges. I made it. Along with the script.