Cheapest priced copy (Fifth Edition): $1.29 at Card Kingdom, near mint, their price list as of .
Gloom 
Enchantment · Uncommon · Fourth Edition Foreign Black Border · #139
White spells cost {3} more to cast.
Activated abilities of white enchantments cost {3} more to activate.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
13 printings · $1.29 to $249.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Unlimited Edition | 111 | Uncommon | $11.99 | — |
| 30th Anniversary Edition | 107 | Uncommon | $3.99 | — |
| 30th Anniversary Edition | 404 | Uncommon | $54.99 | — |
| Revised Edition | 113 | Uncommon | $1.99 | — |
| Fourth Edition Foreign Black Border | 139 | Uncommon | — | — |
| Fourth Edition | 139 | Uncommon | $1.49 | — |
| Fifth Edition | 165 | Uncommon | $1.29 | — |
| Collectors' Edition | 111 | Uncommon | $17.99Out of stock | — |
| Intl. Collectors' Edition | 111 | Uncommon | $15.99 | — |
| Foreign Black Border | 113 | Uncommon | — | — |
| Limited Edition Alpha | 110 | Uncommon | $229.99 | — |
| Limited Edition Beta | 111 | Uncommon | $249.99 | — |
| Summer Magic / Edgar | 113 | Uncommon | — | — |
4 rulings from Wizards of the Coast
- 4 October 2004The extra mana is not considered part of the activation cost. It is a separate cost.
- 4 October 2004The extra mana is part of the total cost, so cost reducers can be applied to this cost.
- 4 October 2004The additional mana is paid at the same time the spell/ability is cast/activated.
- 8 June 2016Activated abilities contain a colon. They're generally written "[Cost]: [Effect]." Some keywords are activated abilities and will have colons in their reminder text.