单卡释疑

• (2021-03-19 official)

  此费用减少之效应只对你施放的所选类别咒语之费用中一般法术力的部分生效。

  The cost reduction applies only to generic mana in the cost of spells of the chosen type you cast.

• (2021-03-19 gpt)

  要计算咒语的总费用，先从要支付的法术力费用或替代性费用开始（例如返照费用），加上费用增加的数量（例如增幅费用），然后再减去费用减少的数量（例如云钥异能的效应）。咒语的法术力值仅由其法术力费用决定，与施放该咒语时所支付的总费用无关。

  To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as a flashback cost), add any cost increases (such as kicker costs), then apply any cost reductions (such as that of Cloud Key's ability). The mana value of the spell is determined by only its mana cost, no matter what the total cost to cast that spell was.