Like it said in the title my magic system is based around an individuals aura that surrounds them and allows them to use it in various ways depending on their aura (make magical effects, augment their body, make physical objects, ect.)

The thing I'm trying to work on now is the limitations of how often you can use your aura and how far you can push yourself until you pass out/die. Also wondering on ways to "recharge" your aura after its been depleted or used up. I was initially thinking resting for a period of time, though I didn't want to go the Dnd route as much. Or maybe eating a large meal and also resting? A mix since I imagine it's your body that needs to refuel.

This is for a TTRPG I'm working on at the moment. Any help is appreciated!