To convert a permanent, turn it so that its other face is up. This follows rules 701.27a–f, 712.9–10, and 712.18. Those rules apply to converting a permanent just as they apply to transforming a permanent.
April 14, 2023 · March of the Machine
To transform a permanent, turn it over so that its other face is up. Only transforming tokens and permanents represented by transforming double-faced cards can transform. (See rule 712, “Double-Faced Cards.”)
July 23, 2021 · Adventures in the Forgotten Realms
To transform a permanent, turn it over so that its other face is up. Only permanents represented by transforming double-faced cards can transform. (See rule 712, “Double-Faced Cards.”)
September 25, 2020 · Zendikar Rising
To transform a permanent, turn it over so that its other face is up. Only permanents represented by transforming double-faced cards can transform. (See rule 711, “Double-Faced Cards.”)
July 3, 2020 · Core Set 2021
To transform a permanent, turn it over so that its other face is up. Only permanents represented by double-faced cards can transform. (See rule 711, “Double-Faced Cards.”)
May 3, 2019 · War of the Spark
Certain spells and abilities can detain a permanent. Until the next turn of the controller of that spell or ability, that permanent can’t attack or block and its activated abilities can’t be activated.
January 25, 2019 · Ravnica Allegiance
Certain spells and abilities can detain a permanent. Until the next turn of the controller of that spell or ability, that permanent can't attack or block and its activated abilities can't be activated.
April 27, 2018 · Dominaria
Certain spells and abilities can detain a permanent. Until the next turn of the controller of that spell or ability, that permanent can’t attack or block and its activated abilities can’t be activated.
September 30, 2016 · Kaladesh
To populate means to choose a creature token you control and create a token that’s a copy of that creature token.
July 17, 2015 · Magic Origins
“Monstrosity N” means “If this permanent isn’t monstrous, put N +1/+1 counters on it and it becomes monstrous.”
May 1, 2014 · Journey into Nyx
“Monstrosity N” means “If this permanent isn’t monstrous, put N +1/+1 counters on it and it becomes monstrous.” Monstrous is a condition of that permanent that can be referred to by other abilities.
February 1, 2014 · Born of the Gods
"Monstrosity N" means "If this permanent isn’t monstrous, put N +1/+1 counters on it and it becomes monstrous." Monstrous is a condition of that permanent that can be referred to by other abilities.
September 27, 2013 · Theros
"Monstrosity N" means "If this permanent isn't monstrous, put N +1/+1 counters on it and it becomes monstrous." Monstrous is a condition of that permanent that can be referred to by other abilities.