Weapons Can Be Niche, but Not Occult

Could lightning be used as a weapon?

Theus thought it probably could not.

To create lightning, one needed a Tesla coil—a distributed-parameter, high-frequency series-resonant transformer capable of producing high-frequency voltages in the millions of volts. It was essentially the best way to produce lightning in a laboratory.

Its overall structure was quite simple. One only needed to connect the power supply to charge a capacitor. Once the capacitor's voltage rose high enough to exceed the spark gap's threshold, the primary LC circuit would undergo series resonance, supplying the secondary coil with sufficiently high excitation power. When the two stages oscillated at the same frequency and resonated, the energy in the primary circuit would surge into the secondary, causing the secondary coil's inductance and distributed capacitance to undergo series resonance. At that point, the discharge terminal voltage would reach its peak—and there was the lightning.

Simply put, an induction coil, a transformer, a spark gap, two large capacitors, and a mutual inductor with only a few turns in its primary coil were enough to form a Tesla coil.

The key was that a simple structure did not mean it could be used in actual combat. First and foremost, storing electrical energy was a major problem.

Once a shell had been manufactured, as long as its most basic storage conditions were ensured, it could sit there for decades without issue.

Try storing a battery for that long?

Not to mention that batteries had an extremely low energy density. To achieve the effect of several bombs exploding, one would need enough batteries to fill an entire train.

Difficult to store, difficult to transport, and ineffective to boot—it had an abysmal cost-performance ratio as a weapon.

Could a problem that Blue Star could not solve be solved here?

The facts proved that it could.