[quote=“Ice-o-metric, post:35, topic:5982”]If you want an example for how the physics of this creature’s ability might work, how’s this:
Electricity and magnetism are inextricably linked, all electrical circuits generate a magnetic field and movement in a magnetic field generates an electrical charge. These creatures exhibit a kind of reverse electromagnetism, containing a type of particle with a complex relationship with magnetism that causes them to absorb magnetism and convert it to electricity. The conversion rate is small, but the effect is exponential in expansion… Which is to say, in a sufficiently powerful field the more magnetism it absorbs the more agitated the particles become, further increasing the rate of absorption. This can result in magnetic levels DRAMATICALLY lower than background, (technically approaching 0, but from a functional standpoint might as well be negative) meaning maintaining an electrical flow burns far more energy as it takes exponentially more power to generate the same level of magnetic field that facilitates the passage of electrons
To state it in a much simpler but technically inaccurate way (on several levels): “They generate an anti-magnetic field that draws power from nearby electrical devices”[/quote]
Pretty much what I was thinking.
That said I’d probably vote against them just spawning rapidly, but instead have them only spawn around places where electricity would still exists, so things like labs (though the main spot would still be the power plant, of course). IMO it would be rather strange to find something that feeds on electricity just randomly out in the middle of a field somewhere. Once we have powerlines that could definitely change though. 
