[AlexanderHowl]

Using the square of ST in W as sustained energy production (a ST 10 human being would produce 100 W, which would translate a 2,200 calorie diet). I would suggest that a realistic sustained psychic power could not use more energy than ten percent of the sustained energy production (10 W for a ST 10 human). In general, that would limit 'realistic' psychic powers to Animal Telepathy, Anti-Psi, Astral Projection, Dream Control, ESP, Probability Alteration, and Telepathy. I think that Biokinesis, Ergokinesis, Psychic Healing, Psychic Vampirism, Psychokinesis, Psychometabolism, and Teleportation are not 'realistic'.