From what I've read in the second post, the brief summary, it at first look seems to me that the old Chinese elements are in use? Earth, Water, Metal, Fire and Wood? I assume these are the forms that the Elementals take, and if so, do these classical elements also inform the Essence of any other races besides the ones listed? Do you have plans for metal, fire, and wood-infused racial essences?

Additionally, are you going to have the Plane of Elementals provide spells associated with all the elements once a sorceror has made a pact with say, a Fire Elemental? Do dragons breathe fire in this setting or does their draconic essence not encroach upon the realm of elements?

Sorry for the deluge of questions, but this fledgling setting is really quite interesting already.