I have developed 21 different secondary powers. They are not the official power that you use in the CYOA for combat that entirely unique to yourself, but something in-universe that anyone like yourself can learn to use with immense effort put in. What is a good stopping point for a number of secondary powers because I feel like I can keep going due to how wide the power-system is and can be.
Example powers include something like nourishment where you use the power-system to provide for nutrition and hydration by continuously siphoning off your energy to your body, so you can skip having to eat or drink in emergencies. Another where you enhance the quality of materials to their max potential using your energy; a blunt object is blunter and denser / a bladed object is sharper and never dulls. To a another power that lets you gift a specific amount of your energy/power to another person (who doesn't even have traditional access to the power-system) so they can have access to the secondary powers and be like a minion, etc.