Will used his energy to create a barrier all around him. Being a warrior, his Battle-energy was substantial enough to pull that task and recently, his Qi training enhanced it.
Leon had been trying to understand why that was the case, and the system explained it perfectly. When a person trains their energy, it can take various forms depending on how or what they want to train.
Battle energy is for warriors, mana is for mages and healers, Qi is life energy, death miasma is for necromancers, blood energy is for blood cultivators like the church, and the aura is for knights. The count went on and on.
The theory stated that when one does energy training, although you could route most if the energy based on your desire a good part is converted into other kind of energy too. That is where the subsequent growth of every kind of energy comes from.
