Although Railgun was Misaka Mikoto's signature move, it was not her strongest technique.
As an Electromaster, her esper ability was to manipulate and use electricity, and electricity was not limited to electromagnetic force alone.
Just like the iron sand from before, electrical currents could be used in many ways. Misaka Mikoto often did not fight by directly using pure electrical force, because it was all too easy to kill someone that way.
Standing atop the Thunder Giant's head, Misaka Mikoto's sailor uniform fluttered in the wind, even faintly revealing the safety shorts that represented her true form.
At that moment, she held out her right hand, her index finger and thumb forming the gesture of a gun.
A powerful current continuously gathered at her fingertip, while arcs of lightning leaped directly from her body.
Spear of Lightning—this was Misaka Mikoto's true powerful move. Once the electrical force gathered at her fingertip reached its limit, a blue-white spear of light formed from a billion volts of current and shot forth at the speed of light in a straight trajectory.
Railgun would eventually dissipate due to air friction after reaching a certain distance, but Spear of Lightning would not.
Not only could a lightning strike at light speed reach a distant location in an instant, but so long as there was a straight line, distance held no meaning. The key was whether the opponent was within Misaka Mikoto's field of vision.
A billion volts of electricity was practically comparable to divine punishment, but it still required a certain amount of charging time from gathering to release.
If her opponent had been another esper from Academy City, that charging time would not have been particularly long.
But the problem was that, judging by the speed and techniques Kanzaki had displayed earlier, that brief