On special occasions, WOTC creates commemorative cards in honor of some former employees.
Luc Mertens, Business Unit Manager Games retired on September 1, 2013 from Cartamundi after 33 years. He has been involved with Magic: The Gathering from the beginning. He has worked at Carta Mundi in Turnhout, Belgium and in Dallas, Texas.
The WOTC Art Dept. made this Commemorative card in his honor.
The card has the same size, thickness and MTG back like a standard card. 20 were given to him or also family, friends, WOTC employees, etc...
The original Magic rulebook, Feature Article
Belgium: Small town is largest manufacter of playing cards, YouTube AP Archive