As Foretold 预示成真 2U
Enchantment 结界
At the beginning of your upkeep, put a time counter on As Foretold.
Once each turn, you may pay {0} rather than pay the mana cost for a
spell you cast with converted mana cost X or less, where X is the
number of time counters on As Foretold.
每回合可以把一个X费以下的咒语变成{0}来施放,
指挥官税是另外付,所以是变成{0}+{2N}这样来付对吗?(N为指挥官税)