If a creature fights itself, it deals damage to itself equal to twice its power.
July 3, 2020 · Core Set 2021
Some effects instruct a player to “play” with a certain aspect of the game changed, such as “Play with the top card of your library revealed.” “Play” in this sense means to play the Magic game.
May 3, 2019 · War of the Spark
Neither activating an ability that creates a regeneration shield nor casting a spell that creates a regeneration shield is the same as regenerating a permanent. Effects that say that a permanent can’t be regenerated don’t preclude such abilities from being activated or such spells from being cast; rather, they cause regeneration shields to not be applied.
January 25, 2019 · Ravnica Allegiance
Neither activating an ability that creates a regeneration shield nor casting a spell that creates a regeneration shield is the same as regenerating a permanent. Effects that say that a permanent can't be regenerated don't preclude such abilities from being activated or such spells from being cast; rather, they cause regeneration shields to not be applied.
April 27, 2018 · Dominaria
Neither activating an ability that creates a regeneration shield nor casting a spell that creates a regeneration shield is the same as regenerating a permanent. Effects that say that a permanent can’t be regenerated don’t preclude such abilities from being activated or such spells from being cast; rather, they cause regeneration shields to not be applied.
September 30, 2016 · Kaladesh
If cards in a player’s library are shuffled or otherwise reordered, any revealed cards that are reordered stop being revealed and become new objects.
September 30, 2011 · Innistrad
rule 701.14c not present in this release
June 17, 2011 · Commander 2011
If a player is searching a hidden zone simply for a quantity of cards, such as “a card” or
April 1, 2011 · Duel Decks: Knights vs. Dragons
If a player is searching a hidden zone simply for a quantity of cards, such as "a card" or "three cards," that player must find that many cards (or as many as possible, if the zone doesn't contain enough cards).
February 4, 2011 · Mirrodin Besieged
If a player is searching a hidden zone simply for a quantity of cards, such as “a card” or “three cards,” that player must find that many cards (or as many as possible, if the zone doesn’t contain enough cards).
October 1, 2010 · Scars of Mirrodin
If a player is searching a hidden zone simply for a quantity of cards, such as “a card” or
February 1, 2010 · Worldwake
If a player is searching a hidden zone simply for a quantity of cards, such as "a card" or "three cards," that player must find that many cards (or as many as possible, if the zone doesn't contain enough cards).