Historical Rules · 8 April 2016
Rule 601.4
Official source text from the 8 April 2016 Rules release
Casting a spell that alters costs won’t affect spells and abilities that are already on the stack.
Historical Rules · 8 April 2016
Official source text from the 8 April 2016 Rules release
Casting a spell that alters costs won’t affect spells and abilities that are already on the stack.