Rule evolution

Rule 202.3e

Previously numbered 202.3b, 202.3c, 202.3d.

Earliest archived Rules release: 2009-10-01 · 1 wording revision · 3 renumberings

  1. Earliest archived Rules release202.3bDetails
    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.
  2. Renumbered202.3b → 202.3cDetails

    Previously
    2. Parts of a Card
    202. Mana Cost and Color

    Then
    2. Parts of a Card
    202. Mana Cost and Color

    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.
  3. Renumbered202.3c → 202.3dDetails

    Previously
    2. Parts of a Card
    202. Mana Cost and Color

    Then
    2. Parts of a Card
    202. Mana Cost and Color

    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.
  4. Renumbered202.3d → 202.3eDetails

    Previously
    2. Parts of a Card
    202. Mana Cost and Color

    Then
    2. Parts of a Card
    202. Mana Cost and Color

    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.
  5. Wording changed202.3eDetails
    When calculating the converted mana costvalue 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.

Current in the latest available Rules
Unchanged since 2026-08-07.