AI Overview: Furnace is a 4-elixir Rare building in Clash Royale that spawns one Fire Spirit at a time. It unlocks in Hog Mountain (Arena 10) and has an Evolution. On June 1, 2026, SeeMeta lists its range cut from 6 to 5.5 tiles. In October 2026, RoyaleTracker’s best Furnace deck won 72.1% over 1,100 battles. Figures are taken from October 2026 card data.
Last Updated: October 2026
Key Points:
- Furnace costs 4 elixir, is a Rare building, and unlocks in Hog Mountain (Arena 10).
- It has an Evolution but no Hero version.
- On June 1, 2026, SeeMeta lists its range cut from 6 to 5.5 tiles.
- RoyaleTracker’s best Furnace deck won 72.1% over 1,100 battles.
- Three of the eight printed lists won over 50%, and the two best are Bridge Spam lists with Evo Battle Ram.
Table of Contents
What Furnace Does
The short version: Furnace is a 4-elixir Rare building that sends Fire Spirits at the enemy. RoyaleTracker’s card text says it spawns one Fire Spirit at a time while dealing damage with its special cauldron brew. It unlocks in Hog Mountain (Arena 10).
It is a building that fires at things and sends Fire Spirits at the enemy over time.
What changed: SeeMeta lists one change: range went from 6 to 5.5 tiles on June 1 (-8.3%). What it means: it covers a little less of the field. RoyaleTracker calls Furnace a troop, but the official card data lists a building, so this page uses building. Arena 5, but RoyaleTracker says Arena 10.
| Stat | Value |
| Elixir cost | 4 |
| Rarity | Rare |
| Type | Building |
| Unlocks | Hog Mountain (Arena 10) |
| Evolution / Hero | Evolution, no Hero |
| Last change | June 1, 2026 (SeeMeta) |
Furnace lost range in June, and the two best lists on its page are still Bridge Spam decks. If the range is trimmed again, those lists lose reach. The negative effect: a building that hits from farther can force a change in how players place it near the river.
Best Furnace Decks Right Now
RoyaleTracker printed eight Furnace decks. The best, an Evo Battle Ram and Evo Royal Ghost list with Giant Skeleton and Heal Spirit, won 72.1% over 1,100 battles. A Bridge Spam list with Ronin won 68.2% over 3,900. A Hog Rider list with Evo Lumberjack won 52.5%.
The pattern: the two best lists share Evo Battle Ram, Evo Royal Ghost, Electro Wizard, Golden Knight and Bandit. The other five won between 41.6% and 47.4%, and the heaviest, at 5.0 elixir, won 47.4%. None of the eight lists runs Evo Furnace. What it means: the Furnace wins inside a Bridge Spam shell.
| Build | Cards | Avg elixir | Win rate (sample) |
| Evo Battle Ram, Evo Royal Ghost and Giant Skeleton | 3.6 | 72.1% (1.1k battles) | |
| Evo Battle Ram, Evo Royal Ghost and Ronin | 3.8 | 68.2% (3.9k battles) | |
| Evo Lumberjack, Evo Mega Knight and Hog Rider | 4.0 | 52.5% (762 battles) | |
| Balloon, Valkyrie and Elite Barbarians | 5.0 | 47.4% (1.1k battles) | |
| Evo Mega Knight, Witch and Goblin Machine | 4.6 | 45.7% (807 battles) | |
| Evo Witch, Giant and Miner | 4.0 | 44.7% (1.1k battles) | |
| Hero Giant, Battle Ram and Barbarian Hut | 4.0 | 42.9% (1.1k battles) | |
| Evo Skeleton Army, Evo Firecracker and Elixir Golem | 3.4 | 41.6% (786 battles) |
Try it yourself: open the Clash Royale Deck Builder with the Evo Lumberjack and Evo Mega Knight build in the table above, 52.5% in the tracker sample (762 battles), already loaded. It averages 4.0 elixir and is the only Furnace list with Hog Rider and Zap. Swap Little Prince for a cheaper card to lower the cost.
How to Play Furnace
- Place it where it covers the bridge. Its range is 5.5 tiles after the June cut.
- Pair it with Bridge Spam. The two best lists do.
- Add cheap cyclers. The best list averages 3.6 elixir.
- Do not stack it with heavy beatdown. The 5.0-elixir list won 47.4%.
- Place it after a defense. It costs 4, so you want a lead.
The move: next game, place Furnace right after you defend, then follow with a Battle Ram on the opposite lane.
Golden Knight is in both top lists, and SeeMeta lists a rework for it on October 6: damage 161 to 168, dash range 5.5 to 5 tiles. If that settles, the Bridge Spam lists may shift. The negative effect: a building that depends on one partner’s dash range is exposed to a single patch.
How to Counter Furnace
- Spells: Fireball or Poison hits the building and its spirits.
- Building-targeting troops: a Hog Rider or Giant goes straight at it.
- Out-range it: a Mortar or X-Bow outranges it.
- Cheap swarm: Skeleton Army clears the Fire Spirits.
The catch: its range is now 5.5 tiles, so check the distance before you place your own building.
Is Furnace Worth Using Now?
Is it worth it? Yes, in Bridge Spam. Three lists won over 50%. The catch: five won under 48%, and none of them is a Bridge Spam list.
What to remember: Furnace is a support building. It is at its best in cheap, fast lists.
Heal Spirit is in the 72.1% list and Arrows in the 68.2% list. SeeMeta lists Heal Spirit’s hitpoints cut on August 4, from 230 to 215, and Arrows’ Crown Tower damage cut on June 1, from 93 to 75. If both are trimmed again, the two best lists lose a cheap tool. The negative effect: the best Furnace lists rest on small cards that keep getting smaller.
Go deeper: For the cards in its best lists, read the Golden Knight guide, the Bandit guide and the Battle Ram guide. To test swaps, load the cards into the Clash Royale Deck Builder and read the average cost it reports.
Frequently Asked Questions
What does Furnace do in Clash Royale?
It spawns one Fire Spirit at a time while dealing damage with its special cauldron brew, according to RoyaleTracker’s card text.
How much does Furnace cost?
4 elixir.
When do you unlock Furnace?
It unlocks in Hog Mountain (Arena 10), per RoyaleTracker. It is a Rare card. Arena 5.
What is the best Furnace deck?
In October 2026, RoyaleTracker listed an Evo Battle Ram, Evo Royal Ghost and Giant Skeleton deck at 72.1% over 1,100 battles.
What counters Furnace?
Fireball or Poison, building-targeting troops, a card that outranges it, or a cheap swarm.
Does Furnace have an Evolution?
Yes. SeeMeta lists a June 1 range cut from 6 to 5.5 tiles for Furnace. It has no Hero. None of the eight lists on this page runs the Evolution.
The Bottom Line
The takeaway: Furnace is a building that sends Fire Spirits. Use it in cheap Bridge Spam lists and place it after a defense.
Sources
Researched from the following (no links, listed for transparency):
- RoyaleTracker, Furnace card page (October 2026 tracker data)
- RoyaleTracker, best decks with Furnace (October 2026 tracker samples)
- SeeMeta, Clash Royale balance changes 2026 (page updated October 8, 2026)
- Supercell, Clash Royale October balance changes 2026 (October 6, 2026)
- Clash Royale card data used by the Deck Builder (elixir costs and card types)
- Supercell official Clash Royale API, card list (elixir cost, rarity, Evolution and Hero flags)