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Message: <blockquote data-quote="s/LaSH" data-source="post: 1706150" data-attributes="member: 6929">Depends. How powerful is the ethereal without a robot?Could it possess a statue and walk it about? If so, then the robot doesn't need a power source.Could it throw lightning, or is generally energetic? It can probably wire into the power grid of the robot, depending on the robot's size, the robot's mechanical power type requirements (no matter how many car batteries you have, you're not going to get the Space Shuttle off the ground), and the ethereal's finesse (elephants are powerful, but do not make good clockmakers; lightning is electricity, but you don't fix your watch battery by catching lightning bolts).If the ethereal is pretty diffuse and abstract from normal reality, I couldn't really say. Depends how you feel about it.If you haven't made up your mind about any of this yet, make something up - just make sure it's cool and kinda makes sense. "Because I say so" is the basis of a great deal in the fantasy and scifi genres; there's no scientific basis for Gandalf whatsoever.</blockquote>