原文For example, say you wanted to choose a target with mana value 3. You need X to be at least 4. You could choose to cast March of Burgeoning Life by exiling two green cards from your hand and paying , by exiling one green card and paying , or just by paying . If you had a reason to, you could even choose a greater value for X.
原文The mana value of March of Burgeoning Life 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.