Winter's NightHow it works & interactions with other cards

Snow-Powered Acceleration

Winter's Night features a triggered ability that fires whenever a player taps a snow land for mana. When this happens, the enchantment provides one additional mana of any type that the land produced. This effectively doubles the output of basic snow lands like Snow-Covered Forest or dual snow lands, provided they are being tapped specifically for mana. Because it is a 'World' enchantment, remember that only one World permanent can exist on the battlefield at a time; if another World permanent enters, Winter's Night will be put into the graveyard.

The Frozen Tax

The benefit of extra mana comes with a restrictive downside: the land used does not untap during its controller's next untap step. This effect creates a 'frozen' state for that land. It is important to note that the ability tracks the land itself, not the player. If the land changes controllers before the next untap step, it will still remain tapped during the new controller's next untap step. Additionally, if the land is somehow untapped through another effect before the untap step, the restriction is satisfied and does not carry over to future turns.

Timing and Resolution

When you tap a snow land for mana, you first receive the mana from the land itself. Then, the Winter's Night trigger goes on the stack. Once that trigger resolves, you choose one type of mana the land produced and add one mana of that type to your mana pool. The 'doesn't untap' effect is applied as part of this resolution. If the land is destroyed or leaves the battlefield before the trigger resolves, you still get the extra mana, though the untap restriction obviously no longer applies to the missing permanent.

When to Play Winter's Night

This card is best utilized in decks that can win quickly with a sudden influx of mana or decks that have alternative ways to untap permanents. Since it affects all players, it can also serve as a disruptive tool against other snow-based strategies, forcing opponents to decide if the extra mana is worth losing their land for a turn. Ensure your deck is built entirely with snow lands to maximize your own benefit while your opponents potentially struggle with standard lands that receive no bonus.

Interaction examples

Basic Snow Synergy

You control Winter's Night and a Snow-Covered Forest. You tap the Snow-Covered Forest for {G}. Winter's Night triggers, adding another {G} to your mana pool for a total of two green mana. During your next untap step, that Snow-Covered Forest will remain tapped.

Managing the Drawbacks

Garruk's Uprising

You have Winter's Night on the battlefield and need to cast Garruk's Uprising, which costs {2}{G}. You tap one Snow-Covered Forest and one Snow-Covered Mountain. Each land triggers Winter's Night, providing a total of {G}{G} and {R}{R}. You use {G}{R} and one other mana to cast the enchantment. While you successfully draw a card from the Uprising, both of your snow lands will stay tapped during your next untap step.

World Rule Interaction

Smothering Tithe

If you have Winter's Night on the battlefield and cast Smothering Tithe, both will stay on the battlefield because Smothering Tithe is a regular Enchantment, not a World Enchantment. However, if another player plays a different World Enchantment, your Winter's Night will be put into the graveyard immediately due to state-based actions.