We could bore a series of holes through the center of the planet and then use gigantic orbital crystals to create a array of lazers to focus the sun's light through to the dark side of the planet.
There's an argument to be had that burning coal doesn't count as magic while fission does, but in any case, good catch, let me amend that to: magic heat-producing rocks that don't fill the atmosphere with dinosaur squeezings.
It's temperature would have to be maintained around absolute zero to compensate for the transmission loss, for that we would need a continuous source of cheap, clean energy.
