Hmmm, this may be a good guess or a stupid guess, it depends if the first reactor is the highest numbered one in Midgar, if it is it's my guess.
I draw strength from your life, (Power taken from the lifestream)
But this strength is not free, (Shinra use it commercially, also it harms the planet)
You will know me as the last, (If it's the highest numbered sector this makes sense)
But it's the first that you seek. (It's the first goal you have)
