Historical Rules · 16 July 2010
Rule 601.4
Official source text from the 16 July 2010 Rules release
Casting a spell that alters costs won't affect spells and abilities that are already on the stack.
Historical Rules · 16 July 2010
Official source text from the 16 July 2010 Rules release
Casting a spell that alters costs won't affect spells and abilities that are already on the stack.