Everything

One important note: Physical-chemistry adjustments MUST fit the paradigm of the mage who’s attempting to use them. A faith-driven priest, for example, probably won’t pray for Jesus to adjust his testosterone! And so, the mage who uses this technique must have a world-view that includes an effective knowledge of body-chemistry and its possibilities.

There’s also a big difference between knowing that you can adjust your pheromones and knowing how to do so in the desired manner. And so, a perfectly fair optional rule would require a

character to have at least three dots in Science with a biochemistry specialty before he could tweak body chemistry with such influential results. A mage could try to perform this feat without the proper knowledge, but he might not get results he had hoped for…

And then, there’s simple blunt trauma – the flood of psychic energy that sends the target into agonized spasms. That mental assault could involve intense emotion, sensory or energetic overload, sudden madness, psychological pain, or an all-out skull-rupturing blast of deadly psychic force.