Rule evolution

Rule 701.12a

Previously numbered 701.8a, 701.9a, 701.10a.

Earliest archived Rules release: 2009-10-01 · 0 wording revisions · 3 renumberings

  1. Earliest archived Rules release701.8aDetails
    A spell or ability may instruct players to exchange something (for example, life totals or control of two permanents) as part of its resolution. When such a spell or ability resolves, if the entire exchange can't be completed, no part of the exchange occurs. Example: If a spell attempts to exchange control of two target creatures but one of those creatures is destroyed before the spell resolves, the spell does nothing to the other creature.
  2. Renumbered701.8a → 701.9aDetails

    Previously
    7. Additional Rules
    701. Keyword Actions

    Then
    7. Additional Rules
    701. Keyword Actions

    A spell or ability may instruct players to exchange something (for example, life totals or control of two permanents) as part of its resolution. When such a spell or ability resolves, if the entire exchange can’t be completed, no part of the exchange occurs. Example: If a spell attempts to exchange control of two target creatures but one of those creatures is destroyed before the spell resolves, the spell does nothing to the other creature.
  3. Renumbered701.9a → 701.10aDetails

    Previously
    7. Additional Rules
    701. Keyword Actions

    Then
    7. Additional Rules
    701. Keyword Actions

    A spell or ability may instruct players to exchange something (for example, life totals or control of two permanents) as part of its resolution. When such a spell or ability resolves, if the entire exchange can’t be completed, no part of the exchange occurs. Example: If a spell attempts to exchange control of two target creatures but one of those creatures is destroyed before the spell resolves, the spell does nothing to the other creature.
  4. Renumbered701.10a → 701.12aDetails

    Previously
    7. Additional Rules
    701. Keyword Actions

    Then
    7. Additional Rules
    701. Keyword Actions

    A spell or ability may instruct players to exchange something (for example, life totals or control of two permanents) as part of its resolution. When such a spell or ability resolves, if the entire exchange can’t be completed, no part of the exchange occurs. Example: If a spell attempts to exchange control of two target creatures but one of those creatures is destroyed before the spell resolves, the spell does nothing to the other creature.

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