It's just hunger, hardly a major issue for him, nothing unbearable.
Zhang Chen began to visualize the "Heaven and Earth" picture in his mind, as it was the perfect opportunity to visualize the scroll and hope to unlock its secrets soon, then allocate the gained points accordingly.
In the blink of an eye, it was the night of the full moon. Though the underground river water was cold and gloomy, Zhang Chen controlled the flow of his Qi blood, speeding it up so that the consumption was slightly fast, yet he didn't feel the chill.
As the full moon rose, the crystal core within Zhang Chen's body suddenly twisted and transformed, emitting a shimmering glow, that glow was bright white, reminiscent of the bright moon in the sky, similar to moonlight.
Then, with a thought, Zhang Chen's body twisted, transforming into a swarm of bats.
A total of thirty-six!
The bats then flapped their wings, passing through a crack ahead, fluttering continuously in the darkness.
