Historical Rules · 1 October 2009
Rule 602.4
Official source text from the 1 October 2009 Rules release
Activating an ability that alters costs won't affect spells and abilities that are already on the stack.
Historical Rules · 1 October 2009
Official source text from the 1 October 2009 Rules release
Activating an ability that alters costs won't affect spells and abilities that are already on the stack.