[問題]流放之徑的演生問題

[crownsoul]

１.對手使用｢伊美黎之盾艾歐娜（Iona, Shield of Emeria）｣，然後選擇白色，請問我是否能立刻回應｢流放之徑（
Path to Exile）｣來放逐它呢？

２.對手使用｢掘墳（Exhume）｣要挖｢伊美黎之盾艾歐娜（Iona, Shield of Emeria）｣，那我能否立刻回應｢流放之徑（Path to Exile）｣來放逐它呢？

３.對手使用｢河流領路人席格（Sygg, River Guide）｣，我立刻回應｢流放之徑（Path to Exile）｣要放逐它，請問對手能否也能支付１白讓｢河流領路人席格（Sygg, River Guide）｣反白，使得我的｢流放之徑（Path to Exile）｣失效呢？


以下是所提到的牌：

伊美黎之盾艾歐娜Iona, Shield of Emeria
６白白白
Legendary Creature - Angel
Flying
As Iona, Shield of Emeria enters the battlefield, choose a color.
Your opponents can't cast spells of the chosen color.
7/7

流放之徑Path to Exile
白
Instant
Exile target creature. Its controller may search his or her library for a basic land card, put that card onto the battlefield tapped, then shuffle his or her library.

掘墳Exhume
１黑
Sorcery
Each player puts a creature card from his or her graveyard onto the battlefield.

河流領路人席格Sygg, River Guide
白藍
Legendary Creature - Merfolk Wizard
Islandwalk
{1}{W}: Target Merfolk you control gains protection from the color of your choice until end of turn.
2/2

[宏鬪牲男囶]

"As" Iona, Shield of Emeria enters the battlefield, choose a color.
Your opponents can't cast spells of the chosen color.
以As開頭的敘述是不進堆疊的而PTE又只能移除已經進場的生物，故當伊歐娜進來就已經說不能使用白色的咒語，PTE也是白色的所以不能施放，所以(1)(2)都是不能！
(3)殺或反色都會進堆疊，席格進場=>PTE施放，PTE進堆疊=>回應反色進堆疊=>反色異能結算，PTE目標落空失效！ 所以是可以的喔！

[crownsoul]

恩，謝謝。

[唬客船長]

看吧~阿猩，我說對了厚= ="