As a player casts a prototype card, the player chooses whether they cast the card normally or cast it as a prototyped spell using the prototype keyword ability (see rule 702.160, “Prototype”).
October 7, 2022 · Unfinity
Effects can cause an Attraction card to enter the battlefield from the command zone. See rule 701.48, “Open an Attraction.”
July 23, 2021 · Adventures in the Forgotten Realms
Only control of the player changes. All objects are controlled by their normal controllers. A player who’s being controlled during their turn is still the active player.
October 4, 2019 · Throne of Eldraine
Only one player can be the monarch at a time. As a player becomes the monarch, the current monarch ceases to be the monarch.
May 3, 2019 · War of the Spark
Because each player draws seven cards when the new game begins, any player with fewer than seven cards in their library will lose the game when state-based actions are checked during the upkeep step of the first turn, regardless of any mulligans that player takes. (See rule 704, “State-Based Actions.”)
January 25, 2019 · Ravnica Allegiance
Because each player draws seven cards when the new game begins, any player with fewer than seven cards in their library will lose the game when state-based actions are checked during the upkeep step of the first turn, regardless of any mulligans that player takes. (See rule 704, "State-Based Actions.")
April 27, 2018 · Dominaria
Because each player draws seven cards when the new game begins, any player with fewer than seven cards in their library will lose the game when state-based actions are checked during the upkeep step of the first turn, regardless of any mulligans that player takes. (See rule 704, “State-Based Actions.”)
August 26, 2016 · Conspiracy: Take the Crown
Because each player draws seven cards when a game begins, any player with fewer than seven cards in his or her deck will lose the subgame when state-based actions are checked during the upkeep step of the first turn, regardless of any mulligans that player takes. (See rule 704, “State-Based Actions.”)
July 22, 2016 · Eldritch Moon
Sometimes a loop can be fragmented, meaning that each player involved in the loop performs an independent action that results in the same game state being reached multiple times. If that happens, the active player (or, if the active player is not involved in the loop, the first player in turn order who is involved) must then make a different game choice so the loop does not continue.