Harmonic Power

Harmonic Power is an energy type in The 15 Keys 2. Harmonic is the energy that grants life, and to use it one must use up their own life force, though Harmonic is extremely powerful, albiet not dangerous.

Harmonisation:

 * This power allows the user to harmonise multiple energy types, and then proceed to use all of them at once. While this does not require life-force it takes decades of training or, in Zach's case, the ability to learn naturally about energy types.

Role against poisoning
Harmonic energy can heal all energy poisoning. First it harmonises all energies (takes longer with Destructix Poisoning), then it purges all other energies while preventing the characters use of them temporarily, and thirdly it them allows for the one who cured the other to use one Harmonic Power to either serve themselves or save their friend from the energy burning them. Choosing the former is rumoured to allow fame and fortune, and is the test of worth, though what this means is unknown.
 * This power is literally time control. It allows for one to travel in time and change events, though the more events changed, the greater the loss of ones life-force. Harmonic Control is this class of energy's unique ability as no other control abilities exist.