原文You choose which cards that you are playing from exile as you play them, not as March of Reckless Joy is resolving.
2022/02/18
原文You may exile more cards than necessary for March of Reckless Joy's first ability, but you can't reduce the mana it costs to less than this way.
2022/02/18
原文The mana value of March of Reckless Joy while it's on the stack is the value chosen for X plus 1, no matter how much mana you actually paid to cast it.