Cheapest priced copy (Tenth Edition): $4.99 at Card Kingdom, near mint, their price list as of .
Manabarbs 
Enchantment · Rare · Unlimited Edition · #164
Whenever a player taps a land for mana, this enchantment deals 1 damage to that player.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
18 printings · $4.99 to $649.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Tenth Edition | 218 | Rare | $4.99 | $27.99 |
| Unlimited Edition | 164 | Rare | $32.99 | — |
| 30th Anniversary Edition | 159 | Rare | $74.99 | — |
| 30th Anniversary Edition | 456 | Rare | $94.99 | — |
| Revised Edition | 165 | Rare | $4.99 | — |
| Fourth Edition Foreign Black Border | 212 | Rare | — | — |
| Fourth Edition | 212 | Rare | $4.99 | — |
| Fifth Edition | 250 | Rare | $5.99 | — |
| Fifth Edition | 250† | Rare | — | — |
| Classic Sixth Edition | 194 | Rare | $6.49 | — |
| Collectors' Edition | 164 | Rare | $9.99 | — |
| Intl. Collectors' Edition | 164 | Rare | $10.99 | — |
| Foreign Black Border | 165 | Rare | — | — |
| Limited Edition Alpha | 163 | Rare | $649.99Out of stock | — |
| Limited Edition Beta | 164 | Rare | $299.99 | — |
| Magic 2010 | 149 | Rare | $5.49 | $14.99 |
| Magic 2012 | 150 | Rare | $5.99 | $14.99 |
| Summer Magic / Edgar | 165 | Rare | — | — |
5 rulings from Wizards of the Coast
- 4 October 2004This card has a triggered ability that causes a separate effect for 1 point of damage each time a land is tapped for mana.
- 1 October 2009If any lands are tapped for mana while a player is casting a spell or activating an ability, Manabarbs’s ability will trigger that many times and wait. When the player finishes casting that spell or activating that ability, it’s put on the stack, then Manabarbs’s triggered abilities are put on the stack on top of it. The Manabarbs abilities will resolve first.
- 1 October 2009The ability will trigger each time a land is tapped for mana. Each ability is separate.
- 1 October 2009On the other hand, a player can tap lands for mana, let the Manabarbs triggered abilities be put on the stack, and then respond to those abilities by casting an instant or activating an ability using that mana. In that case, the spell or ability will resolve first.
- 1 October 2009This ability is not a mana ability. It goes on the stack and can be responded to.