Custom box on Archive Pages?

Hi.

I recently found the Page Links To mod which makes updating indexes on my massive site MUCH, MUCH easier by directing the clicks straight to the archives.

Like this: https://novogradtimes.com/category/class-psionicist/

I am wondering is it possible to get a custom box on the category pages? Like one that only shows for the Class: Psionicist Category and another that only shows for the Warden category?

I would love to do an author highlight here of who writes the column if it is at all possible.

Know anything that does this?

Thanks.