"Part tower, part trap, completely shocking! Zap air and ground foes alike with the power of science!"
Level 1
Level 2
Level 3
Level 4
Level 5
Level 6
Level 7
Level 8
Summary
The Hidden Tesla is a single target defensive building. It is unlocked at Builder Hall level 3.
Before it begins attacking, the Hidden Tesla remains completely invisible to the attacker. Once a unit is within 6 tiles of the Tesla, the Tesla emerges from the ground and begins attacking. Like its Home Village counterpart, it automatically emerges from the ground if it is still hidden when at least 51% of the base is destroyed.
It attacks enemies with electricity, just like its Home Village counterpart. It has the same fire rate and range, however its damage compared to equivalently leveled Hidden Teslas in the Home Village is higher at low levels but lower at high levels.
Offensive Strategy
Enemies need a 2x2 clear space for a Hidden Tesla, evaluate the worst place for a Tesla placement and deploy accordingly.
Sneaky Archers can show you the location of a Hidden Tesla, even when invisible. Placing two Sneaky Archers of relative level will be able to take down the Hidden Tesla.
You can tell the location of an isolated Hidden Tesla if an area on the ground is illuminated without having a building on it during an attack. All buildings illuminate the ground, and the hidden Tesla does as well, even when hidden.
Defensive Strategy
The Hidden Tesla can be used to lure your opponent into an air attack, then take out the air units. This is very effective at Builder Hall level three as they only have Beta Minions; when your opponent destroys your Firecrackers and Archer Tower, he/she will send in his/her Beta Minions only to get destroyed by your Hidden Tesla.
The Hidden Tesla illuminates the ground, so to disguise it, place it near other buildings.
Upgrade Differences
The Hidden Tesla undergoes a significant visual change at level 4.
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.
At level 2, the Hidden Tesla gains additional metal conductors hanging down from the top of the tower and some more support down the bottom.
At level 3, a second wire is added for support on the opposite side, with some more stability on the bottom of the Tesla.
At level 4, the 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. The bottom of the Tesla also turns gold for more support and the top part does too.
At level 6, the Tesla coil up the top turns golden.
At level 7, the Tesla coil is replaced 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.
Trivia
The Hidden Tesla is one of the only defenses in the Builder Base which takes up a 2x2 space.
Icon Descriptions
Tapping this icon displays information about the Hidden Tesla, such as Level, Damage Per Second, Hitpoints, Range, Damage Type and Targets.
Tapping this icon begins upgrading the Hidden Tesla to the next level, if you have enough resources and a free Master Builder or O.T.T.O. When the Hidden Tesla is at maximum level, this icon is not shown.
Tapping this icon instantly upgrades the Hidden Tesla to the next level, at the cost of one Hammer of Building if you have one. When the Hidden Tesla is at maximum level, or the Builder 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, cancels the current upgrade and refunds half of the upgrade cost.
