Sudden Substitution 瞬息置换
Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)
Exchange control of target noncreature spell and target creature. Then the spell's controller may choose new targets for it.
Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)
Exchange control of target noncreature spell and target creature. Then the spell's controller may choose new targets for it.
转瞬（只要此咒语在堆叠上，牌手便不能施放咒语或起动不是法术力异能的异能。）
交换目标非生物咒语与目标生物的操控权。然后该咒语的操控者可以为它选择新的目标。
Paratranz翻译信息
规则叙述翻译：MTGZH
背景叙述翻译：
牌图来源：
单卡释疑
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(2019-08-23 gpt)
如果于瞬息置换结算时，该目标咒语或该目标生物已经是不合法目标，则此交换不会发生。如果这两个目标都合法，但它们都由同一位牌手操控，则此交换也不会发生。
If the target spell or the target creature is an illegal target as Sudden Substitution resolves, the exchange won't happen. If both targets are legal but are both controlled by the same player, the exchange won't happen. -
(2019-08-23 official)
「法术力异能」系指产生法术力的异能，而不是需要支付法术力的异能。
A mana ability is an ability that produces mana, not an ability that costs mana. -
(2021-03-19 official)
具转瞬异能的牌在堆叠上时，牌手依旧会得到优先权；不过此时牌手能够进行的行动仅限于法术力异能和某些特殊动作。
Players still get priority while a card with split second is on the stack; their options are just limited to mana abilities and certain special actions. -
(2021-03-19 official)
具转瞬异能的咒语在堆叠上时，牌手能将牌面朝下的生物翻回正面。
Players may turn face-down creatures face up while a spell with split second is on the stack. -
(2021-03-19 official)
如果某触发式异能结算时要求牌手施放咒语，则如果此时堆叠上已有具转瞬的咒语，牌手便不能施放。
If the resolution of a triggered ability involves casting a spell, that spell can't be cast if a spell with split second is on the stack. -
(2019-08-23 gpt)
如果以此法交换永久物咒语，则其新操控者会操控它所成的永久物。
If a permanent spell is exchanged this way, its new controller will control the permanent it becomes. -
(2019-08-23 gpt)
在多人游戏中，如果在瞬息置换结算后，某个物件的操控者离开了游戏，则让其获得该咒语或永久物操控权的效应会终止。如果该咒语仍在堆叠上，则以此法获得其操控权的牌手不能为其选择新的目标。
In a multiplayer game, if the controller of one of the objects leaves the game after Sudden Substitution resolves, the effect that gave them control of the spell or permanent expires. If the spell is still on the stack, the player who gains control of it this way can't choose new targets for it. -
(2019-08-23 gpt)
如果交换未发生，但该咒语仍是合法目标，则其操控者可以为其选择新的目标。
If the exchange doesn't happen but the spell is still a legal target, its controller may choose new targets for it. -
(2019-08-23 gpt)
此交换会一直持续下去。对该咒语而言，无论该生物是否改变区域或离开游戏，或反之，均不会使得交换终止。
The exchange lasts indefinitely. It doesn't expire for the spell if the creature changes zones or leaves the game, or vice versa. -
(2019-08-23 gpt)
在交换操控权后，该非生物咒语仍在堆叠上，且该生物仍在战场上。
The noncreature spell is still on the stack after exchanging control, and the creature is still on the battlefield. -
(2021-03-19 official)
在具转瞬的咒语结算（或因故离开堆叠）后，牌手便能再度于堆叠上的后续物件结算前施放咒语和起动异能。
After a spell with split second resolves (or otherwise leaves the stack), players may again cast spells and activate abilities before the next object on the stack resolves. -
(2021-03-19 gpt)
转瞬不会让触发式异能不触发，例如虚空圣杯的异能。如果有此类异能触发，则其操控者将其放进堆叠，并为其选择目标（如有）。这些异能将如常结算。
Split second doesn't stop triggered abilities from triggering, such as that of Chalice of the Void. If one does, its controller puts it on the stack and chooses targets for it, if any. Those abilities will resolve as normal. -
(2021-03-19 official)
施放具转瞬的咒语不会影响已经在堆叠上的咒语和异能。
Casting a spell with split second won't affect spells and abilities that are already on the stack.