July 23, 2021 · Adventures in the Forgotten Realms
The mana value of a split card not on the stack or of a fused split spell on the stack is determined from the combined mana costs of its halves. Otherwise, while a split card is on the stack, the mana value of the spell is determined by the mana cost of the half that was chosen to be cast. See rule 709, “Split Cards.”
April 22, 2021 · Strixhaven
The mana value of a split card not on the stack or of a fused split spell on the stack is determined from the combined mana costs of its halves. Otherwise, while a split card is on the stack, the mana value of the spell is determined by the mana cost of the half that was chosen to be cast. See rule 708, “Split Cards.”
May 3, 2019 · War of the Spark
The converted mana cost of a split card not on the stack or of a fused split spell on the stack is determined from the combined mana costs of its halves. Otherwise, while a split card is on the stack, the converted mana cost of the spell is determined by the mana cost of the half that was chosen to be cast. See rule 708, “Split Cards.”
January 25, 2019 · Ravnica Allegiance
The converted mana cost of a split card not on the stack or of a fused split spell on the stack is determined from the combined mana costs of its halves. Otherwise, while a split card is on the stack, the converted mana cost of the spell is determined by the mana cost of the half that was chosen to be cast. See rule 708, "Split Cards."
October 5, 2018 · Guilds of Ravnica
The converted mana cost of a split card not on the stack or of a fused split spell on the stack is determined from the combined mana costs of its halves. Otherwise, while a split card is on the stack, the converted mana cost of the spell is determined by the mana cost of the half that was chosen to be cast. See rule 708, “Split Cards.”
July 22, 2016 · Eldritch Moon
When calculating the converted mana cost of an object with an {X} in its mana cost, X is treated as 0 while the object is not on the stack, and X is treated as the number chosen for it while the object is on the stack.
April 8, 2016 · Shadows over Innistrad
When calculating the converted mana cost of an object with a hybrid mana symbol in its mana cost, use the largest component of each hybrid symbol.
February 1, 2014 · Born of the Gods
Each Phyrexian mana symbol in a card’s mana cost contributes 1 to its converted mana cost.
September 30, 2011 · Innistrad
Each Phyrexian mana symbol in a card's mana cost contributes 1 to its converted mana cost.
June 17, 2011 · Commander 2011
Each Phyrexian mana symbol in a card’s mana cost contributes 1 to its converted mana cost.
May 1, 2011 · New Phyrexia
Each Phyrexian mana symbol in a card's mana cost contributes 1 to its converted mana cost.