Burden of proof: An illustration of the concept

Our fates are controlled by invisible mystical elves living in the Andromeda Galaxy. Prove me wrong. Have you explored every part of the Andromeda Galaxy in which there might be mystical elves? Even if you have, you might have overlooked them because they are invisible. It will not do to say that this faith contradicts physics or logic, since the elves, being mystical, are bound by neither. Finally, even if you do find counter-evidence, the elves could have planted it there either to test our faith or to give themselves an excuse to damn anyone they don't like.