I decided to ignore what was in my design doc regarding this optional boss fight because having the six bosses fight you all at once as-is would be a nightmare of designing a proper fight arena, since they all used their environments in some ways. Instead, you'll fight "light" versions of these formidable enemies, which are still going to be challenging. I'm still not done with this fight - this will probably take one or two days - but it's going well so far!
Time spent on the project so far: 667 hours
Currently working on: An optional boss fight + ending