723Controlling Another Player
Example: The controller of a player can see that player’s hand and the face of any face-down creatures they control.
Example: The controller of another player decides which spells that player casts and what those spells target, and makes any required decisions when those spells resolve.
Example: The controller of another player decides which of that player’s creatures attack, which player or planeswalker each one attacks, and how those attacking creatures assign their combat damage.
Example: If the controller of a player decides that the controlled player will cast a spell with an additional cost of discarding cards, the cards are discarded from the controlled player’s hand.
Example: The player who’s being controlled still decides if they will leave to visit the restroom, trade a card to someone else, agree to an intentional draw, or call a judge about an error or infraction.