Epitaph playmat and ivor full art

How rare is the epitaph series playmat and ivor full art? Is it epitaph only? Is the playmat only one per event?

The Epitaph mat is for the event winner of each event. Ivor is for top 8 and the TO for each event. While the mat will be exclusive to these events, the Ivor, and other errata cards, may be available at future event series.