Refining the Thunder Roc Spell Pellets took little effort for Lin Yun. In seven days, he had finished all three.
He spent all his remaining time refining the Demon Core origin qi he had siphoned from Man Huzi's Level Eight Thunder Whale Demon Core into medicinal pills.
At the same time, he refined the Thunder Essence extracted from the Thunder Whale Demon Core once more, preparing to condense divine thunder next.
Apart from advancing his cultivation, this was currently his highest priority.
After all, finding such pure Heavenly Thunder Essence, imbued with the true intent of tribulation lightning, was no easy task in the Mortal Realm.
Because the world's origin qi had grown so thin, cultivators in the Mortal Realm no longer faced heavenly tribulations when they broke through. Collecting this heavenly lightning during a tribulation was all but impossible.
Aside from that, heavenly lightning tribulations only descended when Demon Beasts assumed human form.
Yet Demon Beasts usually chose remote locations for their transformation tribulations, where human cultivators almost never stumbled upon them.
Even if someone did happen upon one, they would not bother collecting Thunder Essence. A Level Eight demonic cultivator that had just survived its tribulation was worth far more than any Thunder Essence.
The Level Eight Thunder Whale Man Huzi had slaughtered, for instance, had probably encountered him just after surviving its transformation lightning tribulation.
Fortunately, the Thunder Whale was a lightning-attribute Demon Beast and happened to have a Thunder-Absorbing Stone inside its body. During its tribulation, it had absorbed some Heavenly Thunder Essence into its Demon Core, giving Lin Yun the chance to collect this Thunder Essence. Otherwise, who knew how long it would have taken him to condense the world's origin qi into Heavenly Thunder Essence himself?
A month passed in the blink of an