Evan's fingernail-sized, diamond-shaped Primordial Monarch Core was beating like a heart and was absorbing the world essence from the surroundings like a black hole.
It was a good thing that the barrier that covered the entrance of the cave didn't block the flow of the world essence from the outside, otherwise; Evan was afraid that the evolution of his core might have failed due to the lack of a sufficient amount of world essence.
The deep blue-coloured vortex spinning above his head worked like a powerful magnet and continued to pull a large amount of world essence from outside of the cave.
Evan's core was at the absolute limit of Rank One, but it didn't mean just a small amount of world essence was enough to evolve it into a Rank Two core. Even though it was at the absolute limit of Rank One, it still needed a large amount of world essence to complete its evolution.
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