If a spell or ability instructs a player to transform or convert a permanent, and the face that permanent would transform or convert into is an instant or sorcery card face, or is a double-faced token that was created with an instant or sorcery face, nothing happens.
April 14, 2023 · March of the Machine
If a spell or ability instructs a player to transform or convert a permanent, and the face that permanent would transform or convert into is represented by an instant or sorcery card face, or is a transforming token that was created with an instant or sorcery face, nothing happens.
July 23, 2021 · Adventures in the Forgotten Realms
A double-faced card put onto the battlefield from a zone other than the stack enters the battlefield with its front face up by default.
May 3, 2019 · War of the Spark
Meld cards on the battlefield and melded permanents can’t be turned face down. If a spell or ability tries to turn such a permanent face down, nothing happens.
January 25, 2019 · Ravnica Allegiance
Meld cards on the battlefield and melded permanents can't be turned face down. If a spell or ability tries to turn such a permanent face down, nothing happens.
July 22, 2016 · Eldritch Moon
Meld cards on the battlefield and melded permanents can’t be turned face down. If a spell or ability tries to turn such a permanent face down, nothing happens.