This item is a Magic the Gathering playmat, from the Eternal Weekend Pittsburgh 2023 Legacy Championship North America, featuring the Emrakul, the Aeons Torn artwork by Mark Tedin originally featured in Rise of the Eldrazi.
The playmat is embroidered, i.e. it has been stitched with thread on the borders to improve durability and to make it even more visually stunning.
This item is of extreme rarity since it wasn't sold outside of the event.
The playmat size is around 35cm x 60cm.