Demon

Regaining the Grimoire of the Ancient was great fuel to his motivation. It allowed him to work hard and tirelessly to regain his former strength.

However, the Grimoire was not the biggest factor that ignited the blazing flame of motivation inside him.

Learning more about himself and his power was much better than blindly following the Grimoire of the Ancient's guidance.

Zayn finally started to use his brain instead of blindly using the techniques of the Grimoire.

That was also why it took only four months to succeed in the replication of the Soul Symbol of the Green Giant.

What did that mean?

It was pretty simple. Zayn etched the Soul Symbol of the Green Giant Spirits – the symbol he always saw in the empty pages of the Grimoire – on the surface of his third Soulring, creating a small, isolated space for the Green Giant Spirits!