History of CR 601.5

Every distinct wording since 2010, newest first.

June 19, 2026 · Marvel Super Heroes
While announcing the choices of any targets and/or the division or distribution of any effects as described in rules 601.2c–d, some options may be available to a player only if other choices are made later in spellcasting process. In that case, the spell’s controller may consider any other choices to be made during that process, including the choice of any objects that may be used to pay costs for that spell.
April 17, 2026 · Secrets of Strixhaven
If a player is no longer allowed to cast a spell after completing its proposal (see rules 601.2a–d), the casting of the spell is illegal and the game returns to the moment before the casting of that spell was proposed (see rule 733, “Handling Illegal Actions”). It doesn’t matter if a rule or effect would make the casting of the spell illegal while determining and paying that spell’s costs (see rules 601.2f–h) or any time after the spell has been cast.
July 25, 2025 · Edge of Eternities
If a player is no longer allowed to cast a spell after completing its proposal (see rules 601.2a–d), the casting of the spell is illegal and the game returns to the moment before the casting of that spell was proposed (see rule 732, “Handling Illegal Actions”). It doesn’t matter if a rule or effect would make the casting of the spell illegal while determining and paying that spell’s costs (see rules 601.2f–h) or any time after the spell has been cast.
April 4, 2025 · Tarkir: Dragonstorm
If a player is no longer allowed to cast a spell after completing its proposal (see rules 601.2a–d), the casting of the spell is illegal and the game returns to the moment before the casting of that spell was proposed (see rule 731, “Handling Illegal Actions”). It doesn’t matter if a rule or effect would make the casting of the spell illegal while determining and paying that spell’s costs (see rules 601.2f–h) or any time after the spell has been cast.
March 8, 2024 · Fallout
If a player is no longer allowed to cast a spell after completing its proposal (see rules 601.2a–d), the casting of the spell is illegal and the game returns to the moment before the casting of that spell was proposed (see rule 730, “Handling Illegal Actions”). It doesn’t matter if a rule or effect would make the casting of the spell illegal while determining and paying that spell’s costs (see rules 601.2f–h) or any time after the spell has been cast.
February 2, 2024 · Murders at Karlov Manor
If a player is no longer allowed to cast a spell after completing its proposal (see rules 601.2a–d), the casting of the spell is illegal and the game returns to the moment before the casting of that spell was proposed (see rule 729, “Handling Illegal Actions”). It doesn’t matter if a rule or effect would make the casting of the spell illegal while determining and paying that spell’s costs (see rules 601.2f–h) or any time after the spell has been cast.
April 14, 2023 · March of the Machine
If a player is no longer allowed to cast a spell after completing its proposal (see rules 601.2a–d), the casting of the spell is illegal and the game returns to the moment before the casting of that spell was proposed (see rule 728, “Handling Illegal Actions”). It doesn’t matter if a rule or effect would make the casting of the spell illegal while determining and paying that spell’s costs (see rules 601.2f–h) or any time after the spell has been cast.
November 18, 2022 · The Brothers’ War
If a player is no longer allowed to cast a spell after completing its proposal (see rules 601.2a–d), the casting of the spell is illegal and the game returns to the moment before the casting of that spell was proposed (see rule 729, “Handling Illegal Actions”). It doesn’t matter if a rule or effect would make the casting of the spell illegal while determining and paying that spell’s costs (see rules 601.2f–h) or any time after the spell has been cast.
October 7, 2022 · Unfinity
If a player is no longer allowed to cast a spell after completing its proposal (see rules 601.2a–d), the casting of the spell is illegal and the game returns to the moment before the casting of that spell was proposed (see rule 728, “Handling Illegal Actions”). It doesn’t matter if a rule or effect would make the casting of the spell illegal while determining and paying that spell’s costs (see rules 601.2f–h) or any time after the spell has been cast.
June 10, 2022 · Commander Legends: Battle for Baldur’s Gate
If a player is no longer allowed to cast a spell after completing its proposal (see rules 601.2a–d), the casting of the spell is illegal and the game returns to the moment before the casting of that spell was proposed (see rule 727, “Handling Illegal Actions”). It doesn’t matter if a rule or effect would make the casting of the spell illegal while determining and paying that spell’s costs (see rules 601.2f–h) or any time after the spell has been cast.
October 4, 2019 · Throne of Eldraine
Some spells specify that one of their controller’s opponents does something the controller would normally do while it’s being cast, such as choose a mode or choose targets. In these cases, the opponent does so when the spell’s controller normally would do so.
May 3, 2019 · War of the Spark
Casting a spell that alters costs won’t affect spells and abilities that are already on the stack.
January 25, 2019 · Ravnica Allegiance
Casting a spell that alters costs won't affect spells and abilities that are already on the stack.
July 22, 2016 · Eldritch Moon
Casting a spell that alters costs won’t affect spells and abilities that are already on the stack.
July 17, 2015 · Magic Origins
rule 601.5 not present in this release
February 1, 2014 · Born of the Gods
A player can’t begin to cast a spell that’s prohibited from being cast.
September 30, 2011 · Innistrad
A player can't begin to cast a spell that's prohibited from being cast.
June 17, 2011 · Commander 2011
A player can’t begin to cast a spell that’s prohibited from being cast.
April 1, 2011 · Duel Decks: Knights vs. Dragons
A player can't begin to cast a spell that's prohibited from being cast.
October 1, 2010 · Scars of Mirrodin
A player can’t begin to cast a spell that’s prohibited from being cast.
February 1, 2010 · Worldwake
A player can't begin to cast a spell that's prohibited from being cast.