The Celestus 穹天仪
If it's neither day nor night, it becomes day as The Celestus enters.
{T}: Add one mana of any color.
{3}, {T}: If it's night, it becomes day. Otherwise, it becomes night. Activate only as a sorcery.
Whenever day becomes night or night becomes day, you gain 1 life. You may draw a card. If you do, discard a card.
如果当前既非白昼也非黑夜，则于穹天仪进战场时成为白昼。
{T}：加一点任意颜色的法术力。
{3}，{T}：如果当前是黑夜，则成为白昼。若否，则成为黑夜。只能于法术时机起动。
每当白昼成为黑夜或黑夜成为白昼时，你获得1点生命。你可以抓一张牌。若你如此作，则弃一张牌。
如果当前既非白昼也非黑夜，则于穹天仪进场时成为白昼。
{T}：加一点任意颜色的法术力。
{3}，{T}：如果当前是黑夜，则成为白昼。若否，则成为黑夜。只能于法术时机起动。
每当白昼成为黑夜或黑夜成为白昼时，你获得1点生命。你可以抓一张牌。若你如此作，则弃一张牌。
Paratranz
翻译信息
规则叙述翻译：MTGZH
背景叙述翻译：N/A
牌图来源：N/A
单卡释疑
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(2021-09-24 official)
在牌手于其重置步骤中重置永久物之前，游戏便会检查是否应转变天色。
Before a player untaps their permanents during the untap step, the game checks to see if the day/night designation should change. -
(2021-09-24 official)
如果当前是黑夜，且前一回合的主动牌手在其回合中施放了两个或更多咒语，则天色成为白昼。
If it is night, and the active player of the previous turn cast two or more spells during their turn, it becomes day. -
(2021-09-24 official)
如果你选择以穹天仪抓一张牌，但有效应将该次抓牌替代成了其他事情，你依然需要弃一张牌。
If you choose to draw a card with The Celestus but some effect replaces that card draw with something else, you will still have to discard a card. -
(2021-09-24 gpt)
白昼和黑夜是游戏本身可以具有的称号。游戏开始时既不是白昼也不是黑夜。一旦游戏成为白昼（或较少见的黑夜），游戏将会是这两者之一——白昼或黑夜——并在游戏剩余时间中不断交替。
Day and night are designations that the game itself can have. The game starts as neither. Once the game becomes day (or less commonly, night), the game will be exactly one of them—day or night—going back and forth for the rest of the game. -
(2021-09-24 gpt)
如果某触发式异能的触发条件为「每当白昼变成黑夜或黑夜变成白昼时」，则该异能只会在游戏已经是白昼或黑夜的情况下触发，并在其变成另一种状态时触发。它不会在游戏首次成为白昼或黑夜时触发。
If a triggered ability triggers whenever day becomes night or night becomes day, it only triggers if it was already either day/night and becomes the other. It does not trigger when the game becomes day or night for the first time. -
(2021-09-24 official)
如果当前是白昼，且前一回合的主动牌手在其回合中没有施放咒语，则天色成为黑夜。
If it is day, and the active player of the previous turn cast no spells during their turn, it becomes night.