- For the Builder Base building with the same name, see Hidden Tesla/Builder Base.
"Lay a deadly trap with the Hidden Tesla! Our Wizards have trapped a storm cloud into each of these sneaky towers. When an enemy walks or flies close enough, the tower springs up and fries it using the power of Electrickery!"
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| Level 1 | Level 2 | Level 3 | Level 4 |
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| Level 5 | Level 6 | Level 7 | Level 8 | Level 9 |
- Summary
- The Hidden Tesla is a defensive building with a twist: Similar to a Spring Trap or Bomb, it stays hidden and appears when a ground or air unit gets close, or when 51% of the base is destroyed. However, unlike a Trap, it does not have to be rearmed after being deployed.
- The Hidden Tesla is unlocked at Town Hall level 7.
- A major source of confusion regarding the Hidden Tesla is that while it has a range of 7, it has a trigger range of 6. The Hidden Tesla will not appear unless the enemy units come within its 6-tile trigger range. The only exception to this rule is that Hidden Teslas will reveal themselves once a base has incurred at least 51% damage, as they must be destroyed (along with all other buildings) in order to achieve 3 stars.
- Once the Hidden Tesla is revealed, it will stay visible and attack units out to its maximum range of 7 tiles until it is destroyed.
- Defensive Strategy
- The main advantage of the Hidden Tesla is that it is (hopefully) a surprise. Capitalize on that. A well-placed Hidden Tesla can wreak havoc on an attacker's offensive strategy.
- Unfortunately, many players design their villages such that it has only as many 2x2 open spaces within its layout as it has Hidden Teslas (and possibly Giant Bombs) available, which makes it obvious where they are located. Instead, try to make sure that there are a few different places where Hidden Teslas could be lurking.
- A good strategy is to create "dummy" 2x2 open spaces to make the enemy think they know where your Hidden Teslas are. For example, you unlock 2 Hidden Teslas at Town Hall 7. You could create two empty 2x2 spaces in your base which are actually empty, while deploying your Hidden Teslas elsewhere, increasing the chances of surprising your opponent.
- Be cautious when upgrading the Hidden Tesla, as this will reveal its location to future attackers. Combat this by relocating it during the upgrade period.
- Although a Hidden Tesla being upgraded loses the merit of being invisible, it still keeps the demerit of being unable to cause a no-spawn zone.
- Make sure to place your Hidden Tesla in a space where Troops cannot be placed (an empty space no larger than 2xn), as unlike other defenses structures, Hidden Teslas do not expand your no-spawn zone, meaning that Troops can be placed directly on top of a Hidden Tesla.
- Common around Crystal League, players put their Hidden Teslas beside an exposed Town Hall and gain some Trophies from unprepared snipers.
- Offensive Strategy
- Before attacking, look for obvious places where a Hidden Tesla might be located, and avoid them. Hidden Teslas will only activate when Troops come close to them. If one happens to trigger, keep in mind that it has a low range. If you cannot destroy it easily, avoid deploying more Troops near it if possible, as Hidden Teslas can deal high amounts of damage.
- If you see a 2x2 empty square space surrounded by Walls, it is very likely that a Hidden Tesla has been placed there. Be aware that Hidden Teslas are only for Town Hall level 7+. If it is a Town Hall 6, it is most likely a Giant Bomb.
- One Giant and a few Archers can quite easily destroy a Hidden Tesla, as it has relatively low health.
- Some people have free places inside Walls, but place a Hidden Tesla to deceive the enemy.
- If you have the opportunity to observe a village prior to attacking, such as when planning a revenge, then watch the Villagers. They can reveal the location of Hidden Teslas by walking up to the "empty" spot where the Tesla is hidden and clapping.
- Upgrade Differences
- Hidden Teslas undergo significant visual changes at levels 4, 7 and 8.
- When initially constructed, the Hidden Tesla consists of a tall, slender wooden lattice structure with a wire coiled up one support. The top of the tower has a metal conducting rod protruding from it. On each side of the tower's base are what appear to be open trapdoors, evidence of the fact that it buries oneself under the ground until an enemy comes through.
- The levels 2 and 3, Hidden Teslas gain additional metal conductors hanging down from the top of the tower, and a second wire coiled up the support on the opposite side of the tower.
- The level 4 Hidden Tesla acquires its namesake Tesla coil at the top. At level 5, the metal conductor pieces turn golden yellow, and a third coil of wire appears on the front support. At level 6, the Tesla coil itself turns golden as well.
- The level 7 Hidden Tesla replaces the Tesla coil with a set of massive horizontal bronze rings. The three smaller wire coils on the tower supports disappear and are replaced with a very thick coil of wire running up the front support. When it fires, the rings glow a steady blue.
- The level 8 Hidden Tesla replaces the horizontal bronze rings with a set of transformer coils and is black with a yellow glow in the middle. More wires appear wrapped around the building, and zaps of electricity jump from the tower several times per minute.
- At level 9, the Hidden Tesla's electrical coils are now reduced from 5 to 4. The 4 coils look like smaller versions of the level 7 Tesla's coil, and are now positioned firmly together on a circular plate. A small blue emplacement in the center appears to be holding the 4 coils together.
- Trivia
- Hidden Teslas are not traps. Their aesthetics trick some into believing that they are traps, but they're actually permanent structures just like any other defensive building.
- The Tesla was also present in the game series "Command And Conquer Red Alert", where the Soviets used the Tesla as a defensive structure.
- The Hidden Tesla gets its name and appearance from the Tesla Coil, invented by the scientist Nikola Tesla.
- Lightning Spells, Freeze Spells, and Earthquake Spells cannot harm a Hidden Tesla if it has not yet been revealed.
- Defense-targeting Troops (e.g. Giants) will not target a Tesla until it is revealed, even if all other defenses are destroyed.
- The Hidden Tesla can have troops spawned on top of it if it's in a 3x3 square. Placing a troop into the spawn hole will cause the Hidden Tesla to pop up and start attacking.
- Some players place their Hidden Teslas usually with traps near their exposed Town Hall to mock snipers or make them use most of their troops to prevent them from taking the loot lately.
- When you are viewing your village, the Tesla will eject small sparks.
- The level 7 Tesla has the same top piece as the level 7 Laboratory.
- In Clash Royale, the card "Sparky" shares the same feature.
- The Tesla will still create sparks even if it is being upgraded.
- Like the Mortar, the Hidden Tesla can one-shot a same-level Archer, e.g. a level 4 Hidden Tesla can one-shot a level 4 Archer. However, this is not true for a Level 5 Archer.
- You can discover an opponent's Tesla when scouting if you see a villager tapping on a open 2*2 space.
- As of the October 2016 update, the Hidden Tesla no longer does double damage to the P.E.K.K.A. It will also not identify it as its priority target during a defense.
Icon Descriptions
 | Tapping this icon displays information about the Hidden Tesla/Home Village, such as Level, Damage Per Second, Hitpoints, Range, Damage Type and Targets. |
 | Tapping this icon begins upgrading the Hidden Tesla/Home Village to the next level, if you have enough resources and a free Builder (or B.O.B). When the Hidden Tesla/Home Village is at maximum level, this icon is not shown. |
 | Tapping this icon instantly upgrades the Hidden Tesla/Home Village to the next level, at the cost of one Hammer of Building if you have one. When the Hidden Tesla/Home Village is at maximum level, or if the Town Hall requirements for the next level are not met, this icon is not shown. |
 | Tapping 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. |
 | Tapping 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. |
 | Tapping 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. |
 | Tapping this icon, which is displayed only while an upgrade is in progress, boosts all your Builders for 1 hour by a factor of ten, at the cost of one Builder Potion. This icon is only shown if you have at least one Builder Potion. |
 | Tapping this icon, which is displayed only while an upgrade is in progress, cancels the current upgrade and refunds half of the upgrade cost. |
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