Chakra

Chakra is essential to even the most basic technique; it is the moulding of the subtle (non-physical) energy channels in the body, called nadiis. Nadiss are channels in the subtle body through which the life force, or vital energy moves. Once moulded, it can be channelled through the chakra circulatory system, which is to chakra as the regular circulatory system is to blood, to any of the 361 chakra points (called tenketsu) in the body. Through various methods, the most common of which is channelling your chakra to your hands, or feet. Giving you access to Chakra attraction, and elemental techniques.

Elemental Affinity Techniques
The Elemental Affinities in which a person possesses are gifted by their Kingdom's leader. The elemental affinity depends on the kingdom, Aeolus grants the newborn the elemental affinity of Air, and Wind. Gaia grants Earth, and Rock. Poseidon, Water and Ice, as Vulcan grants Fire and Lava.