Elements
Ok, elements will choose if you have an advantage disadvantage and what attacks you can use. If you are fighting someone with your advantage your attack does double to that opponent.
Fire: Strong against nature. Weak Against water. Allows you to use fire and attacks.
Water: Strong against Fire and Earth: Weak against Electricity and nature. Allows healing and water techniques.
Nature: Strong against Water. Weak against fire. Allows nature and earth techniques.
Electricity: Strong against Water. Weak against Earth. Allows Electricity techniques.
Earth: Strong Against electricity. Weak against water. Allows Nature, earth and techniques.
These elements can be chosen at level 50. You will keep your original element and get one of the two here.
Dark: Strong Against All elements. Weak Against Light. Allows to use dark techniques.
Light: Strong Against all elements. Weak against none.