Lucifer just watched the brain and Berde fix the carriage and make it useable again.
Well, it was mostly Berde who was doing the hard work since the brain cannot exactly do that kind of stuff.
He was the one who picked up the parts of the carriage that Lucifer had just broken.
It was not that big of a deal, and he was able to fix the carriage in just a few minutes.
Well, it's not like the carriage is advanced technology or anything of the sort that would need an expert to fix it.
If one knows enough about the structure of the carriage, then one would be able to build one.
That's just how it is, and it seems that Berde definitely knows the structure of the carriage for him to be able to fix the carriage in no time just like this.
Anyway, when the carriage was finally fixed, the brain...finally started to work.
Of course, his work was...getting the illusion started again.