Yiazmat Card

Yiazmat Card is a legendary Triple Triad card.

Source
Yiazmat Cards can be obtained as a drop in a duty or purchased from vendors.

Duties
Yiazmat Cards can be obtained as a drop from the following duties:
 * The Ridorana Lighthouse

Vendors
Yiazmat Cards can be obtained during the Moogle Treasure Trove event by exchanging 7 with the following vendors:
 * Itinerant Moogle

This item will become available for exchange once the player has obtained the the achievement Didn't Stop, Made It Pop.