User can manipulate ego, id, superego. They can manipulate their id, which contains a person's instinctual, basic needs; the ego, which acts according to the reality principle and balances both the id's needs and reality; and the superego, which reflects the internalization of cultural rules. They can influence these things to determine what a person might do, whether good or bad, and they can override or strengthen one of the three. They could also weaken the three parts of the psyche or negate them.