Primal refers to any energy that is provided from your own plane. Usually in the Zithket it is receiving energy from local spirits and nature. Yet in other planes their primal energy is derived and manifested much differently but still must be categorized as a Primal power source.
Tapping into the Primal Power Source:
Appeasing and understanding spirits in any location that you are venturing to will become important to you for you are using their power. Most give their aide readily but at times you might find your majicks dwindling.
Primal Power Source Bonuses
Add 1d4 per tier healing for anytime that you spend a healing surge.