法术
抓三张牌。
固色~如果施放此咒语时支付过至少三点蓝色法术力,则占卜3。
If an effect allows you to cast a spell without paying its mana cost, you can't choose to cast it and pay unless another rule or effect allows you to cast that spell for a cost. Similarly, you can't waive a cost reduction unless that effect says you may.