Instant, BB (2) Look at target opponent's hand and choose a card from it. That player plays that card with his or her own mana, but you make all decisions it calls for. The player is required only to spend mana in his or her mana pool and/or mana that can be produced by lands.1
Illus. Jesper Myrfors
10/4/2004: Word of Command can't be used to force a player to play a card that isn't in his or her hand.
10/4/2004: If used with a card that allows your opponent to search his or her library, you do not get to look through that player's library. You get to name a legal card for them to take. If it is in the library, they take it. If not, you name another card. Repeat until you name one that they have. Remember that even on-resolution decisions are made by Word of Command's player.
10/4/2004: Your opponent can't counter the Word of Command after letting you look at his or her hand, but they can attempt to counter the spell you force them to cast.
10/4/2004: You may Command your opponent to play a land (if they have not already done so this turn).
10/4/2004: You must order your opponent to cast a spell or play a land if it is possible to do so.
10/4/2004: If there is a non-mana way to cast a spell, as with Pitch Spells, you may require that way to be used if it is possible to do so.
10/4/2004: Since this spell is an Instant, your opponent gets a chance to respond to it as normal. Once this spell resolves, you look at your opponent's hand and choose a spell or land. Note that it is common practice to respond to Word of Command by using up any spells or mana you have prior to letting it resolve.
10/4/2004: During the resolution of this spell, that player plays the chosen card.
10/4/2004: To "play a card" is to either cast a spell or to put a land onto the battlefield using the main phase special action.
10/1/2009: You do get to choose which lands get tapped. You can make them choose an optional mana generating ability of the land that they tap, such as making them tap and sacrifice the land instead of just tap it.
Unlimited Edition
(Rare)