The Warhammer 40,000 Commander Decks are the newest IP cross-over in the Magic, the Gathering card game. The Warhammer 40,000 Miniature game is a popular wargame created by Games Workshop. Set in the 41st millennium, Warhammer 40,000 has a science-fiction setting with a number of classic fantasy tropes such as magic, daemons, Orcs, Elves, and wizards.
The Warhammer 40,000 Commander Decks features 4 new Commander Decks which can either come in Regular or Collector's editions. The Collector's Edition features cards in "Surge Foil" which is a new foiling type for Magic, the Gathering. Three Secret Lair drops will be accompanying the Commander Deck release for Warhammer 40,000. [source]