Snow-Covered Plains

The Kaldheim set doesn't have any cards with mana costs that include snow mana , but some previous sets do. If an effect says such a spell costs 1 generic mana less to cast, that reduction doesn't apply to any snow mana costs. This is also true for activated abilities that include snow mana in their activation costs and effects that reduce those costs.

Snow isn't a type of mana. If an effect says you may spend mana as though it were any type, you can't pay for snow mana using mana that wasn't produced by a snow source.

In a Limited event (usually Booster Draft or Sealed Deck), you can't add basic snow lands to your card pool as you would other basic lands. You can play with basic snow lands only if you open them in your sealed deck or draft them.