FOILCheapest priced copy (Eighth Edition): $9.49 at Card Kingdom, near mint, their price list as of .
Furnace of Rath 
Enchantment · Rare · Eighth Edition · #187★
If a source would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
10 printings · $9.49 to $39.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Tenth Edition | 204 | Rare | $11.99 | $24.99 |
| Eighth Edition | 187 | Rare | $9.49 | — |
| Eighth Edition | 187★ | Rare | — | $39.99 |
| Ninth Edition | 188 | Rare | $9.49 | — |
| Ninth Edition | 188★ | Rare | — | $19.99 |
| Duels of the Planeswalkers | 44 | Rare | $11.99 | — |
| Planechase | 55 | Rare | $10.99 | — |
| The List | TMP-177 | Rare | $11.99 | — |
| Salvat 2011 | 104 | Rare | — | — |
| Tempest | 177 | Rare | $10.99 | — |
5 rulings from Wizards of the Coast
- 4 October 2004If you have two of these on the battlefield, the damage is multiplied by 4.
- 4 October 2004The multiplied damage counts in all ways as if it came from the original source. Furnace of Rath is not the source.
- 4 October 2004If a spell or ability damages multiple things, divide up the damage before applying this effect. This means you can’t normally end up with an odd amount of damage on something.
- 4 October 2004The trample rules cause damage to be divided before it is doubled.
- 1 August 2005If multiple effects modify how damage will be dealt, the player who would be dealt damage or the controller of the creature that would be dealt damage chooses the order to apply the effects. For example, Mending Hands says, “Prevent the next 4 damage that would be dealt to any target this turn.” Suppose a spell would deal 5 damage to a player who has cast Mending Hands targeting themselves. That player can either (a) prevent 4 damage first and then let Furnace of Rath double the remaining 1 damage, taking 2 damage, or (b) double the damage to 10 and then prevent 4 damage, taking 6 damage.