I have thought about this question. Beyond obvious things like other lifeforms on Earth and the power of our home star (nothing to sneeze at when considering universal forces natural or supernatural) and so on I would say I operate on brain power. the power of the human nervous system. Psychic power might be a better term, the power of the psyche. It's not indelibly tied to the body. I recognize out of body experiences including what I would call spirit travel: going places at night in what seems like a dream but seeing verifiable precise details of an unexpected event and retaining those details on waking, then finding out what you saw was exactly accurate.