雪境

万智牌机制

凯德海姆世界整体焦点在于境域之间的碰撞、常人难以想象的大规模战斗，以及源远流长的冲突过往。但除此之外，这个世界可能还有点寒冷。到访此处时别忘了带上几件厚点的衣服。雪境是复出的超类别，可与多种牌张类别组合，包括所有永久物类别、瞬间和法术。

雪境 Rules

A supertype that’s normally relevant on permanents. See rule 205.4, “Supertypes.”

205.4a: An object can have one or more supertypes. A card’s supertypes are printed directly before its card types. The supertypes are basic, legendary, ongoing, snow, and world.
205.4b: An object’s supertype is independent of its card type and subtype, even though some supertypes are closely identified with specific card types. Changing an object’s card types or subtypes won’t change its supertypes. Changing an object’s supertypes won’t change its card types or subtypes. When an object gains or loses a supertype, it retains any other supertypes it had.
205.4c: Any land with the supertype “basic” is a basic land. Any land that doesn’t have this supertype is a nonbasic land, even if it has a basic land type. Cards printed in sets prior to the Eighth Edition core set didn’t use the word “basic” to indicate a basic land. Cards from those sets with the following names are basic lands and have received errata in the Oracle card reference accordingly: Forest, Island, Mountain, Plains, Swamp, Snow-Covered Forest, Snow-Covered Island, Snow-Covered Mountain, Snow-Covered Plains, and Snow-Covered Swamp.
205.4d: Any permanent with the supertype “legendary” is subject to the state-based action for legendary permanents, also called the “legend rule” (see rule 704.5j).
205.4e: Any instant or sorcery spell with the supertype “legendary” is subject to a casting restriction. A player can’t cast a legendary instant or sorcery spell unless that player controls a legendary creature or a legendary planeswalker.
205.4f: Any permanent with the supertype “world” is subject to the state-based action for world permanents, also called the “world rule” (see rule 704.5k).
205.4g: Any permanent with the supertype “snow” is a snow permanent. Any permanent that doesn’t have this supertype is a nonsnow permanent, regardless of its name.
205.4h: Any scheme card with the supertype “ongoing” is exempt from the state-based action for schemes (see rule 704.6e).