Winter's Night

Enchant World    (CMC:3)

Whenever a player taps a snow land for mana, that player adds one mana to his or her mana pool of any type that land produced. That land doesn't untap during its controller's next untap step.

200 ME2 • ENRob Alexander

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Oracle Text (click to copy):

Winter's Night {R}{G}{W} World Enchantment Whenever a player taps a snow land for mana, that player adds one mana to his or her mana pool of any type that land produced. That land doesn't untap during its controller's next untap step.

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10/1/2008
If a land affected by Winter's Night is untapped at the time its controller's next untap step begins, the "doesn't untap" effect doesn't do anything. It won't apply at some later time when that land is tapped.
10/1/2008
Winter's Night doesn't track the lands' controllers. If an affected land changes controllers before its old controller's next untap step, Winter's Night will prevent it from being untapped during its new controller's next untap step.
10/1/2008
This has the supertype world. When a world permanent enters the battlefield, any world permanents that were already on the battlefield are put into their owners' graveyards. This is a state-based action called the "world rule." The new world permanent stays on the battlefield. If two world permanents enter the battlefield at the same time, they're both put into their owners' graveyards.

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