Every distinct wording since 2010, newest first.
April 14, 2023 · March of the Machine
Scheme is a card type seen only on nontraditional Magic cards. Only the Archenemy casual variant uses scheme cards. See rule 904, “Archenemy.”
July 23, 2021 · Adventures in the Forgotten Realms
Conspiracy cards are used only in limited play, particularly in the Conspiracy Draft variant (see rule 905). Conspiracy cards aren’t used in constructed play.