Wordpress: display N posts on static page from RSS source

wp_rss_feed.php

<?php
  $rss = fetch_feed( 'http://www.ondango-labs.com/feed/' );

  if (!is_wp_error( $rss ) ) : 
    $maxitems = $rss->get_item_quantity(5); 
    $rss_items = $rss->get_items(0, $maxitems); 
?>

<div class="three-from-four" id="latest-posts-box">

  <?php foreach($rss_items as $index => $item): ?>
  <article class="one-from-two element <?= ($index % 2 == 1) ? 'last' : '' ?>">
     <h2>
        <a href="<?php echo esc_url( $item->get_permalink() ); ?>" title="<?php echo $item->get_title(); ?>">
          <?php echo $item->get_title(); ?>
        </a>
      </h2>
      <div class="element-body">
        <?php echo $item->get_description(); ?>
      </div>
  </article>
  
  <?php endforeach; ?>
</div>

<?php endif; ?>