Opponent

An Opponent is the human player you are playing a game of Duel Masters against.

Details
In an official game, there are only 2 players (yourself and your opponent) playing against each other, but in multiplayer casual formats, any number of players is possible. In this case, any other player not considered an ally (for team games such as 2v2), is also considered your opponent.
 * For card abilities such as Mana Crisis that would remove a card from your opponents mana zone would require to specify a single opponent.

See also:
 * Opponent Reliance