I read Phillip Farber's Brain Magick a few times every year. He takes a secular, non-deity, non-traditional contemporary approach to invocation and evocation. In his frame, you can evoke/invoke almost anything related to your body or even constructs that you create. Emotions, diseases, desires and so on...
Is there anything in Taoist theory that suggests that a person couldn't evoke/bind energy from their dantian(s), impregnate it with whatever (moar power, X form of chi, Y form of chi, a command) and then invoke it back into their body?