原文Effects that increase or decrease costs are applied after you choose the value of X, and will not impact the results of the spell.
2021/04/16
原文You can choose 0 as the value of X as you cast Multiple Choice, but it will have no effect when it resolves.
2021/04/16
原文If an effect allows you to cast Multiple Choice without paying its mana cost, you must choose 0 as the value of X. Cheating on tests is frowned upon.