merge our domains’ blogs onto one page

We want to merge blogs from our multiple domains (like https://www.rocketllama.com/blog-it and https://www.actionflickchick.com/superaction) onto a single page. The simplest way to do that should be to make a page which reads the separate RSS feeds (https://www.rocketllama.com/blog-it/feed/ and https://actionflickchick.com/superaction/?feed=rss2), but I just have no idea how to do that.

Any help would be appreciated.