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For the Home Village version, see Spring Trap/Home Village.
Spring Trap info.png

"This bouncy little number will toss unwanted visitors right off your property!"


Spring Trap1.png Spring Trap3.png Spring Trap5.png
Level 1 Level 2-3 Level 4

Summary

  • The Spring Trap is a defensive trap in the Builder Base that springs ground troops off the map. The units will appear to fly out of the map.
  • The Spring Trap does not need the Master Builder or O.T.T.O for construction, however, they are required for upgrading.
  • The Spring Trap can spring a certain number of troops, depending on its spring capacity. Higher leveled Spring Traps have a larger spring capacity, allowing them to launch more troops at once.

Strategies

  • Spring Traps can be combined with Push Traps by facing Push Traps toward the Spring Trap. This is useful in eliminating distraction troops like Boxer Giants so that your defenses will focus on the other enemy troops.
  • Grouping Spring Traps isn't recommended since only a few small troops like Raged Barbarians can trigger them easily.
  • Spring Traps can launch Cannon Carts completely without allowing its Last Stand ability to be activated, but if it launches Night Witches, they will activate the Bat Swarm ability and spawn a few Bats.
  • Spring Traps are often used in one-by-one holes leading to something like a Crusher. Use a few cheap troops like Raged Barbarians to trigger them. Alternatively, use the Battle Machine or a Super P.E.K.K.A, as they are not affected by it.

Upgrade Differences

  • The Spring Trap undergoes significant visual changes at levels 2 and 4.
  • At level 1, the Spring Trap appears to be a wooden board on a metal spring.
  • At level 2, the Spring Trap's spring becomes much thicker, and the wood also becomes much wider and thicker.
  • At level 4, the Spring Trap gains a metal border around the board's edges, which looks identical to a level 5 Spring Trap from the Home Village.

Trivia

  • The Spring Trap gains more spring capacity per upgrade and has a higher maximum spring capacity than its Home Village counterpart, but begins with fewer.
  • The Spring Trap can fail to trigger properly if a Raged Barbarian's rage ability is active while running past the trap without stopping.
  • The Spring Trap has the fewest levels, unlike any other traps and buildings in Builder Base.

Icon Descriptions

Icon Info.pngTapping this icon displays information about the Spring Trap, such as Level, Damage Type and Targets.
Icon Upgrade.pngTapping this icon begins upgrading the Spring Trap to the next level, if you have enough resources and a free Master Builder or O.T.T.O. When the Spring Trap is at maximum level, this icon is not shown.
Icon HoB.pngTapping this icon instantly upgrades the Spring Trap to the next level, at the cost of one Hammer of Building if you have one. When the Spring Trap is at maximum level, or the Builder Hall requirements for the next level are not met, this icon is not shown.
Icon FinishNow.pngTapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of the displayed number of Gems.
Icon FinishNowBoB.pngTapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of one Book of Building. This icon is only shown if you have at least one Book of Building.
Icon FinishNowBoE.pngTapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of one Book of Everything. This icon is only shown if you have at least one Book of Everything but do not have a Book of Building.
Icon Cancel.pngTapping this icon, which is displayed only while an upgrade is in progress, cancels the current upgrade and refunds half of the upgrade cost.
Builder Hall Level 1 2 3 4 5 6 7 8 9
Number Available 0 0 2 2 3 3 3 5 6
Size Size
1x1
Level
Level
Spring Capacity
Spring
Cost
Builder Gold
Build Time
Time
Experience Gained
Experience
Builder Hall Level Required
Builder Hall
1 8 10,000 N/A N/A 3
2 12 30,000 1h 60 4
3 16 100,000 8h 169 6
4 20 300,000 12h 207 8
Trigger Radius Range Damage Type Damage Type Unit Type Targeted Favorite Target Favorite Target Favorite Target
0.7 tiles Bounces away troops Ground None
Builder Base Buildings
Defensive Buildings CannonDouble CannonArcher TowerHidden TeslaFirecrackersCrusherGuard PostAir BombsMulti MortarRoasterGiant CannonMega TeslaLava LauncherWalls
Traps: Push TrapSpring TrapMineMega Mine
Resource Buildings Builder Hall (Magic Items) • Gold MineElixir CollectorGold StorageElixir StorageGem MineO.T.T.O Hut
Army Buildings Builder BarracksArmy CampStar LaboratoryBattle Machine Altar
Other Buildings BoatDecorationsObstaclesClock Tower
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