This was easily accomplished, without fears of gravitic distortion, radiation poisoning, control, or a source of energy. These are hideously egregious examples of parts of stories where things seem to happen too easily, where cause and effect done line up, and where simple actions have unbelievably massive repercussions. I'm sure you'll be utterly shocked to discover I have a theory on this, and a helpful concept on designing how power and influence, from armies to psychic powers. Control your utter surprise, and read on about the Power Pyramids. And I'm sorry I couldn't think of a better name.
Nothing happens without a reason.
That seems obvious in writing, but the problem is having the correct reasons - and enough of them. The more of an effect something has, the more powerful a being is or the more deadly an army, the more you have to explain and explain in an effective manner. When figuring out how your characters, organizations, devices, etc. influence each other, get ready to put in some thought. A character may be able to fight well because of a good trainer, or prefer to keep their hair short because they're used to it. Those are simple explanations for simple effects, and you really don't need much more than that.