The Default and Icon Media Card’s use a ghost button link while the Link Icon Media Card makes the whole card clickable.
<div class="tcu-media-card _icon-link">
<a href="#" class="tcu-media-card__content">
<img src="https://assets.tcu.edu/cornerstone/images/facebook-icon.svg" alt="" aria-labelledby="tcu-media-card-2">
<h2 id="tcu-media-card-2">Facebook</h2>
</a>
</div>