Historical Rules · 1 November 2013
Rule 601.3a
Official source text from the 1 November 2013 Rules release
If there is more than one opponent who could make such a choice, the spell's controller decides which of those opponents will make the choice.
Historical Rules · 1 November 2013
Official source text from the 1 November 2013 Rules release
If there is more than one opponent who could make such a choice, the spell's controller decides which of those opponents will make the choice.