Historical Rules · 18 June 2010
Rule 305.5
Official source text from the 18 June 2010 Rules release
Land subtypes are always a single word and are listed after a long dash. Land subtypes are also called land types. Lands may have multiple subtypes. See rule 204.3h for the complete list of land types. Example: "Basic Land -- Mountain" means the card is a land with the subtype Mountain.