He fused the core with the shell of his origin core. The two circular objects superimposed and then fused. As soon as the world core fused with his Origin core, it began to light up. Gehald expected this to happen, and he knew that when the world core is possessed by a soul, it will try to create a new world and a body for it, so Gehald brought out tonnes of mid-grade origin cores. He had made a lot of preparation so he wouldn't be caught off guard.
The world core started to create a whirlpool of energy around it. It was trying to suck in energy to create a new body. The quality of energy it absorbs will determine the structural integrity of the inner world and the strength of the body.
While the amount of energy will determine the size of both the inner world and the body, the quality of the energy also affects the density of its body to a large extent, which will determine its physical and magical defense.
