Historical Rules · 28 April 2017
Rule 602.4
Official source text from the 28 April 2017 Rules release
Activating an ability that alters costs won’t affect spells and abilities that are already on the stack.
Historical Rules · 28 April 2017
Official source text from the 28 April 2017 Rules release
Activating an ability that alters costs won’t affect spells and abilities that are already on the stack.