NBA, where miracles happen. Is this sentence wrong?

I think this is an ellipsis. This is where the magic happens. As an advertising language of NBA, brevity is obviously very important, and it is also easy to remember and spread widely.

In addition, amazing is definitely an adjective, which can't replace the things described by rich, so I think it is a linguistic deviation to some extent, that is, the variation of language in order to attract people's attention, which means "amazing things" for the sake of brevity.

Also, this sentence seems to be translated as "a miracle happened here"