Cheapest priced copy (Revised Edition): $0.79 at Card Kingdom, near mint, their price list as of .
Magnetic Mountain 
Enchantment · Rare · Fourth Edition · #209
Blue creatures don't untap during their controllers' untap steps.
At the beginning of each player's upkeep, that player may choose any number of tapped blue creatures they control and pay {4} for each creature chosen this way. If the player does, untap those creatures.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
6 printings · $0.79 to $11.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Revised Edition | 163 | Rare | $0.79 | — |
| Fourth Edition Foreign Black Border | 209 | Rare | — | — |
| Fourth Edition | 209 | Rare | $0.99 | — |
| Arabian Nights | 41 | Uncommon | $11.99 | — |
| Foreign Black Border | 163 | Rare | — | — |
| Summer Magic / Edgar | 163 | Rare | — | — |