Well first thought, is a depressing one, a mirror imagem the foe you can bever win agaisnt is your equal mirror image a man a woman possesing your weaknesses and strenghts a mirror it should be.
Second thought, a shadow,one that constantly follows your every move, yet dependant on you yet your superior in everything it always haunts you, a shadow cast at the floor it should be.
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Do electric wolves dream of electric sheep?