最近開團，在回去檢查所有玩家的法術列表跟專長跟屬性跟XXXXX的時候發生了下列的問題
關於超魔咒使的三級能力
Metamagic Effect (Su): At 3rd level, an incantatrix can attempt to apply a metamagic feat she possesses to a persistent spell effect that is already in place. For example, she could use Extend Spell to extend the duration of a wall of force or Maximize Spell to maximize the damage dealt by a cloudkill. To use this ability, the incantatrix must be adjacent to or within the spell effect and make a successful Spellcraft check (DC 18 + [3 × modified spell level]. "Modified spell level" is the level of the spell slot that the spell would occupy if it were prepared with the metamagic feat applied. Spell slot increases for metamagic feats that were applied to affect the spell's casting (such as Still Spell, Silent Spell, or Quicken Spell) do not count toward the modified spell level, but adjustments for metamagic that change the spell's effect (such as Empower Spell, Enlarge Spell, or Widen Spell) do count.
For example, applying the Extend Spell feat to a wall of fire gives it a modified spell level of 5th (4th for the spell +1 for the Extend Spell feat), so the DC would be 18 + (3 × 5) = 33. If the wall of fire had been cast with the Silent Spell feat applied, the DC is still 33, since that feat applies to the spell's casting, not its effect. On the other hand, extending an empowered wall of fire would give it a modified spell level of 7th and a Spellcraft DC of 39.
An incantatrix can use this ability a number of times per day equal to 3 + her Int modifier. Using this ability is a full-round action that provokes attacks of opportunity.
At 3rd level, an incantatrix can attempt to apply a metamagic feat she possesses to a persistent spell effect that is already in place.
区域超魔（Su）：3级的超魔咒使可以尝试使用一项已知的超魔专长影响已经产生的区域法术效果。举例来说，她可以尝试对已施展的力墙术使用法术延时，对已施展的死云术使用法术极效。使用这项能力，超魔咒使必须临近法术区域，或者处于法术范围之中。然后，她必须成功的通过法术辨识鉴定（DC18+[3x修正后的法术等级]）。“修正后的法术等级 ”指的是已经准备好的搭配了超魔专长之后的法术位所在的法术等级。不能够影响区域效果的超魔专长无需增加法术等级（比如默发，定发，瞬发），能改变法术效果的超魔专长（比如强效，增远，延展）则可以。
關鍵在於an incantatrix can attempt to apply a metamagic feat she possesses to a persistent spell effect that is already in place.
不少玩家覺得，這並非只影響已發生的範圍法術，而是已發生的法術都可已超魔，因此全身BUFF掛滿。
但是考慮作者舉的例子來說，火牆跟死雲都確實是"已施展的範圍法術"沒錯。請問各位DM大大在這個解讀上會怎樣判定呢？
