The process of elemental practice starting from the Upper layer and heading towards the start of stage 3 was quite phenomenal.
As already known, once one had reached the upper layer, his elemental conductor would be already full, thus no more elements could be stored within the body.
As such, the last step to the 3rd stage was actually the creation of an 'Elemental Domain'!
Using the elements in one's body as some sort of a magnetic field, and through the opening of the skin barrier, one would be able to store elements around his body to a certain distance according to the concentration of the elements contained within.
Thus as one built his 'Elemental Domain', it could be treated as an extension of 'Elemental Armament', meaning that one could create elemental weapons further away from his body as progress towards the 3rd stage increased!