Here is my code so far:

```
if (!empty($page['content']['system_main']['nodes']) && is_array($page['content']['system_main']['nodes'])) {
    foreach ($page['content']['system_main']['nodes'] as $nid => &$content) {

        // Blog
        if ($content['#node']->type == 'blog') {
            $description = ???;
        }

    }
}   

```

I can't figure out how to access the node's unformatted body field, I can't believe it's so difficult to achieve such a simple task..