This is by far the best and easiest way to reveal shards in Team Ring Domination. I decided to Make a new WWE Supercard Tips video for this after being informed about this yesterday from a member of the community. Since the event is still going on you can still use this right now before it's over to get the main card if you haven't gotten it already or the 2nd or 3rd card your team is trying to get quicker.
https://www.youtube.com/watch?v=9jzxXK2afmQ&index=6&list=PLEHMOL-GTJq_vibDk0US-1cBo8rQ2cYDP