30th Anniversary Edition

Magical Hack

Change the text of target spell or permanent by replacing all instances of one basic land type with another. (For example, you may change "swampwalk" to "plainswalk." This effect lasts indefinitely.)

Fifth Edition

Change the text of target permanent or spell by replacing all instances of one basic land type with another. (For example, you may change "swampwalk" to "plainswalk." If this spell targets a permanent, play it as an instant.)

Fourth Edition Foreign Black Border

Fourth Edition

Change the text of target spell or target permanent by replacing all occurrences of one basic land type with another. For example, you may change "swampwalk" to "plainswalk."

Summer Magic / Edgar

Foreign Black Border

Revised Edition

Change the text of any card being played or already in play by replacing one basic land type with another. For example, you can change "swampwalk" to "plainswalk."