C'est la variante Archenemy. Et l'archenemy révèle toujours un scheme au début de la phase principale 1, quoi qu'il se passe.
904. Archenemy
904.1. In the Archenemy variant, a team of players faces off against a single opponent bolstered with powerful scheme cards. The Archenemy variant uses all the normal rules for a _Magic_ game, with the following additions.
904.2. The default setup for an Archenemy game is the Team vs. Team multiplayer variant (see rule 808) involving exactly two teams. The attack multiple players option (see rule 802) and the shared team turns option (see rule 805) are used; no other multiplayer options are used.
904.2a One of the teams consists of exactly one player, who is designated the archenemy.
904.2b The other team consists of any number of players.
904.3. In addition to the normal game materials, the archenemy needs a scheme deck of at least twenty scheme cards. A scheme deck may contain no more than two of any card with a particular English name. (See rule 312, "Schemes.")
904.4. At the start of the game, the archenemy shuffles his or her scheme deck so that the cards are in a random order. The scheme deck is placed face down next to the archenemy's library. All scheme cards remain in the command zone throughout the game, both while they're part of a scheme deck and while they're face up.
904.5. The archenemy's starting life total is 40. Each other player's starting life total is 20.
904.6. Rather than a randomly determined player, the archenemy takes the first turn of the game.
904.7. The owner of a scheme card is the player who started the game with it in the command zone. The controller of a face-up scheme card is its owner.
904.8. Any abilities of a face-up scheme card in the command zone function from that zone. The card's static abilities affect the game, its triggered abilities may trigger, and its activated abilities may be activated.
904.9. Immediately after the archenemy's precombat main phase begins during each of his or her turns, that player moves the top card of his or her scheme deck off that scheme deck and turns it face up. This is called "setting that scheme in motion." (See rule 701.22.) This turn-based action doesn't use the stack. Abilities of that scheme card that trigger "When you set this scheme in motion" trigger.
904.10. If a non-ongoing scheme card is face up in the command zone, and it isn't the source of a triggered ability that has triggered but not yet left the stack, that scheme card is turned face down and put on the bottom of its owner's scheme deck the next time a player would receive priority. (This is a state-based action. See rule 704.)
904.11. Once an ongoing scheme card is set in motion, it remains face up in the command zone until an ability causes it to be abandoned (see rule 701.23).