Adam sensed within it a high-grade energy aura so faint it was nearly imperceptible, and the judgment was easy enough to make: with Lina's strength, there was no way she could possess the ability to keep drawing in elements inside Adam's own elemental vacuum. What the Refinement Art refined had to be an energy higher than elements.
Adam even felt it was in no way inferior to mana.
But this was deeply abnormal. If there existed, in the Dragon-Slaying Organization — or in the Dragon Plane — a race capable of cultivating an energy of such a grade, even at a slow efficiency, they would absolutely never have been limited by the transcendent bottleneck.
Unless this energy was never meant for cultivation at all, and Lina's so-called bloodline advancement was only a negligible side effect of it — or perhaps even an illusion produced by her bloodline running at high speed.