A rubber playmat featuring the design of Destined Rivals.

This mat will be awarded during the Yu-Gi-Oh! Day to be held on December 5th and 6th, to 1 player of each 8-player pool. In order to participate, players have to purchase 1000 yen of the Selection 10 product that releases in that time frame.

The mat will also be available in future events (in case the first batch on eBay costs a fortune).

Source.