Deck Master

In the Virtual World arc of the Yu-Gi-Oh! second series anime, each duelist chooses any card they would otherwise use in the duel, including cards from the Extra Deck. This is then known as the duelist's Deck Master. These Deck Masters are not classed as being the field, and stay face-up next to the player until the player decides to Special Summon it to his/her side of the field. If this were likened to a real-world mechanic, it would be similar to the Side Deck; the only major differences are that the card is face-up and can be used and played during the duel itself rather than in between duels. Other than these differences, the Deck Master is simply placed aside like the Side Deck.

The Deck Master can be Special Summoned at any time during the Duel. Each card has its own effect as a Deck Master. If a player's Deck Master is destroyed, he/she loses the duel. If a player's Deck Master is Tributed by a card effect to Special Summon another monster, or used as a Fusion Material Monster, or can otherwise be immediately replaced such as by the effect of A Deal with Dark Ruler the monster that is Special Summoned next becomes the player's new Deck Master. During a tag-team Duel, if both players in a team have their Deck Masters Tributed or used as Fusion Material Monsters, the Special Summoned monster is treated by both players as being their Deck Master.

See also: Deck Master Abilities.