Well it's affecting everyone, so it doesn't make sense for it to be magic or radiation or something. Back on my world, before I came here, this guy arrived from space and he could completely cut off my powers like none of us had seen before. He changed my blood just by touching me. With the satellite crash here not that long ago and people talking about this kind of thing happening before in other cities?

I'm not saying it's the best idea, but it makes sense.