Cheapest priced copy (Fourth Edition): $3.49 at Card Kingdom, near mint, their price list as of .
Magical Hack 
Instant · Rare · Revised Edition · #65
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.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
14 printings · $3.49 to $799.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Unlimited Edition | 64 | Rare | $23.99 | — |
| 30th Anniversary Edition | 63 | Rare | $23.99 | — |
| 30th Anniversary Edition | 360 | Rare | $69.99 | — |
| Revised Edition | 65 | Rare | $4.49 | — |
| Fourth Edition Foreign Black Border | 83 | Rare | — | — |
| Fourth Edition | 83 | Rare | $3.49 | — |
| Fifth Edition | 101 | Rare | $3.99 | — |
| Collectors' Edition | 64 | Rare | $8.99 | — |
| Intl. Collectors' Edition | 64 | Rare | $15.99Out of stock | — |
| Foreign Black Border | 65 | Rare | — | — |
| Limited Edition Alpha | 63 | Rare | $799.99 | — |
| Limited Edition Beta | 64 | Rare | $199.99 | — |
| Secret Lair Drop | 2141 | Rare | — | $3.99 |
| Summer Magic / Edgar | 65 | Rare | — | — |
9 rulings from Wizards of the Coast
- 4 October 2004It only changes what is printed on the card (or set on a token when it was created or set by a copy effect). It will not change any effects that are on the permanent.
- 4 October 2004You choose the words to change on resolution.
- 4 October 2004It can’t change a word to the same word. It must be a different word.
- 4 October 2004It can be used to change a land’s type from one basic land type to another. For example, Forest can be changed to Island so it produces blue mana. It doesn’t change the name of any permanent.
- 4 October 2004If you change the text of a spell which is to become a permanent, the permanent will retain the text change until the effect wears off.
- 4 October 2004Can target a card with no appropriate words on it, or even one with no words at all.
- 4 October 2004You can’t change proper nouns (i.e. card names) such as “Island Fish Jasconius”.
- 4 October 2004Alters all occurrences of the chosen word in the text box and the type line of the given card.
- 4 October 2004Changing the text of a spell will not allow you to change the targets of the spell because the targets were chosen when the spell was cast. The text change will (probably) cause it to be countered since the targets will be illegal.