Originally Posted by
Arbitrarity
I disagree with Ruby swearing, because it feels very out-of-character.
I'm guessing Herc is tracking Saber via the Sword, since he's drawing power from it. He also has fairly amazing senses, so no questions about why he can find Erik. At least if Herc is going after Erik, Arturia might be able to get Avalon, but I guess she has to actually protect him first. Good planning to go after the more vulnerable target.
Black holes always feel like a weird addition if you're not in outer space, because their behaviour never makes sense when they're visible in fiction at planetary scales (even at solar/galactic scales it's usually wrong, but planetary scales it's just impossible). I would MUCH rather blame the First/Fifth Magic, the Pruning Theoretical Phenomenon, or some other Grand Order Singularity related reason than "there's an actual black hole here". At least it can not be an actual black hole and just be something that looks like it that's actually something else?
Define a Schwarzschild radius for your black hole, plug it into a calculator, find its mass, then figure out how far away it is, and look at the acceleration. A 9mm radius black hole has approximately Earth-mass, and will pull someone 100km away towards it at 400m/s^2. Also, the "time slowing" effect of the black hole is for outside observers, and doesn't help the person actually being sucked in. The person being sucked in will see everything further away seem to speed up, as you're doing, but the gravity required for even a 5-1 speedup puts you basically inside the event horizon at that point (you get 5-1 at a distance of under 2x the event horizon radius, and when the event horizon is 9mm, you're touching the damn thing, and are spaghetti already). 432000-1 is obviously even closer.
</angry physics rant noises>
There are a couple of places where you switch speakers in the same line with a sentence separation, which makes it difficult to track who's speaking, except by context.