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// The results of electricity being absent due to the lines being worked on, for a longer period of time than initially declared 
// Story: Book 1 - The Behemoth came to Canterlot 
// by Equimorto 
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She was almost sure she had it. Almost. Had she been fully sure, of course, she would have gone through with things already. In her unsureness, however, she preferred to wait a little longer, to study it a little more, to figure it out more properly. But the time she had was finite, she knew that much. On top of that, she had no certainty she would remain undetected forever.
Momentarily she glanced back. The spell had spread farther. Its speed wasn't consistent, but judging by the distance still left between its edge and the buildings near the centre of town she had somewhere between a couple minutes and a few more than that. For the sake of safety, she had to assume she'd get no more than the minimum.
She could feel the connection. She could sense the weapon on the other end, as revolting as the spell itself. Her magic probe had almost gotten dragged through the moment she'd pushed far enough, but she'd managed to hold on. In theory she had everything she needed. In practice, she was not fully convinced yet. There was something off about the tunnel between the spell and its source. Something she couldn't quite place that she feared would throw off the whole thing if she went about it like it was normal.
But time was running out and her probing was getting her nowhere. Swallowing her tension, she set to trying to solve things. She located the connection properly, and placed her magic on the edge of it, tendrils extending into the tunnel and unnaturally stretching along its whole length. She was very careful not to go too far with them though, stopping just short of the weapon to avoid being detected.
A filter was probably there. Even aside from that, she hadn't had and did not have then the time to properly analyse the weapon itself. She could send something through, but she couldn't craft something designed to shut off what was there when she didn't have any precise idea of what it actually was like. The best she could do was a generic spell that would hopefully work.
The easiest solution, and the one most likely to succeed, was to simply send through a standard pulse meant to shut off the weapon with enough raw energy behind it to get through whatever shielding might have been there. It wasn't elegant, but it was feasible. The connection itself was already built to allow a huge amount of energy to pass through it. She'd be firing the equivalent of a supercharged stun spell directly into the weapon's system, and hoping there were no measures against it in place.
Which there most likely weren't. She'd be effectively hitting from inside the weapon, bypassing all external protection and only having to deal with its innate structural integrity and inner security measures. She was extremely doubtful the ponies who'd designed it had ever forseen the possibility of someone tunneling to the weapon itself through the active spell. Attempting something like that would have been close to a suicide for almost anyone.
She had her plan then, and time to execute it. She swallowed again, getting ready for the next step and getting ready to act quickly after it. She regretted not planning it in advance, and not setting some constructs up to come help her when the need was there. In order to make sure she was putting in enough energy to shut down the weapon, she'd have to drop her magical camouflage. She hoped she could do everything quickly enough to teleport away before any shots reached her.