Resources

Magic: The Gathering Comprehensive Rules Changes

Planar Chaos to Future Sight (Single Change View)

General changes

Old rule (Planar Chaos) New rule (Future Sight)

Dual Land (Informal)

The Ravnica (tm) block and early Magic core sets contain "dual lands"; each of these has two basic land types. For example, Temple Garden has the land types Forest and Plains. Dual land cards have the default abilities of both basic land types and are treated as both by all spells and abilities that specifically refer to those types. However, they are not basic lands. A dual land doesn't count as two lands while in play-it's just one land with multiple land types.

Dual Land (Informal)

The Ravnica block and early Magic core sets contain "dual lands"; each of these has two basic land types. For example, Temple Garden has the land types Forest and Plains. Dual land cards have the default abilities of both basic land types and are treated as both by all spells and abilities that specifically refer to those types. However, they are not basic lands. A dual land doesn't count as two lands while in play-it's just one land with multiple land types.