From the Official English Facebook Duel Links account:

Hope you have been enjoying the ZEXAL world and Xyz Summoning!

Try the Snapchat ZEXAL AR lens filter by scanning the Snapcode below. Post your picture with the filter on Twitter or Instagram with hashtags #sweepstakes and #DLZEXALAR for a chance to win some cool prizes!

We’ll randomly select 5 entries to receive a Yu-Gi-Oh! Duel Links jacket and special commemorative coin!

Check out the full terms and conditions:

Terms and Conditions

Source