*looks around for someone better to give advise*
alrighty well i am ..well to put it bluntly just plain awful at helping and explaining but you get spirit power by developing your character through conflict..
if that helps :S
sorry if it makes no sense at all but its just like to get better you have get hurt first. Then work on your characters resolve to increase their power and overcome whatever obstacle have previously stopped them from tapping into their power.
like i said i am awful at giving help..but i try

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thebleachworld.darkbb.comI close my eyes, slip into a wakeless dream and let the feeling wash over me as my heart begins to change. My time has come, the future just beginning to let me down, i look to the stars as they start to ease the pain. Nows the time for change, nothing stays the same....nothing stays the same.