If the effect of a static ability regenerates a permanent, it replaces destruction with an alternate effect each time that permanent would be destroyed. In this case, “Regenerate [permanent]” means “Instead remove all damage marked on [permanent] and its controller taps it. If it’s an attacking or blocking creature, remove it from combat.”
July 3, 2020 · Core Set 2021
If a player is searching a hidden zone for cards with a stated quality, such as a card with a certain card type or color, that player isn’t required to find some or all of those cards even if they’re present in that zone.
May 3, 2019 · War of the Spark
Some effects cause a player to search a library for a card or cards, shuffle that library, then put the found card or cards in a certain position in that library. Even though the found card or cards never leave that library, they aren’t included in the shuffle. Rather, all the cards in that library except those are shuffled. Abilities that trigger when a library is shuffled will still trigger. See also rule 401, “Library.”
January 25, 2019 · Ravnica Allegiance
Some effects cause a player to search a library for a card or cards, shuffle that library, then put the found card or cards in a certain position in that library. Even though the found card or cards never leave that library, they aren't included in the shuffle. Rather, all the cards in that library except those are shuffled. Abilities that trigger when a library is shuffled will still trigger. See also rule 401, "Library."
April 27, 2018 · Dominaria
Some effects cause a player to search a library for a card or cards, shuffle that library, then put the found card or cards in a certain position in that library. Even though the found card or cards never leave that library, they aren’t included in the shuffle. Rather, all the cards in that library except those are shuffled. Abilities that trigger when a library is shuffled will still trigger. See also rule 401, “Library.”
September 30, 2016 · Kaladesh
To untap a permanent, rotate it back to the upright position from a sideways position. Only tapped permanents can be untapped.
September 30, 2011 · Innistrad
rule 701.19b not present in this release
June 17, 2011 · Commander 2011
“Clash with an opponent” means “Choose an opponent. You and that opponent each
April 1, 2011 · Duel Decks: Knights vs. Dragons
"Clash with an opponent" means "Choose an opponent. You and that opponent each clash."
February 4, 2011 · Mirrodin Besieged
“Clash with an opponent” means “Choose an opponent. You and that opponent each clash.”
October 1, 2010 · Scars of Mirrodin
“Clash with an opponent” means “Choose an opponent. You and that opponent each
February 1, 2010 · Worldwake
"Clash with an opponent" means "Choose an opponent. You and that opponent each clash."