Blue smoke drifted through the air. The Rebirth Dragon's Essence in Su Xiao's hand gradually turned gray-white, and the life energy within it showed faint signs of drying up.
Last time, Su Xiao had absorbed roughly one-third of the energy in the Rebirth Dragon's Essence, raising Blue Steel Shadow from Lv.30 to Lv.39.
This time, Su Xiao absorbed all the remaining two-thirds of the energy. As his strength increased, the maximum amount of energy he could absorb in one sitting had also risen significantly.
However, even after completely draining the energy within the Rebirth Dragon's Essence, Blue Steel Shadow had not undergone any major leap. In other words, Blue Steel Shadow had only risen by one level.
The energy required to raise Blue Steel Shadow from Lv.39 to Lv.40 was astonishing, even exceeding the total energy required to raise it from Lv.30 to Lv.39.
With a crisp crack, the Rebirth Dragon's Essence in Su Xiao's hand shattered, transforming into a skyful of crystal fragments that gradually vanished into the air.
Su Xiao sat cross-legged on the bed with his eyes tightly shut. The blue smoke around his arm dissipated, and the basketball-sized grinning skull disappeared.
Blue Steel Shadow energy surged through Su Xiao's body. His Mana was down to only 2 points. This had happened because nearly all his Mana had been converted into Blue Steel Shadow energy.
The nature of the Blue Steel Shadow energy within his body had not changed, but the energy was continuously compressing. This was not a quantitative change, but a qualitative one.
Su Xiao did not sense anything unusual within his body, so he chose to wait quietly for the Blue Steel Shadow energy to change.
A full hour later, the Blue Steel Shadow energy within him finally calmed down.
Blue Steel Shadow had