Because the God of Knowledge had gained additional domains, His followers rapidly increased. In particular, the former followers of the God of Tomes and the God of Scholars accepted Vol's faith without much resistance and became His loyal believers.
There were two reasons for this. On one hand, they truly needed a faith. Vol's domains and achievements were also well suited to scholars and bookworms like them. On the other hand, because they were relatively well educated, no matter how devout their faith, they were unlikely to become fanatics—fanaticism and ignorance were two sides of the same coin; the more enlightened the populace, the lower the proportion of fanatics—so they could accept the fact that a god had died and His domains had changed hands.
It was like in those martial arts films: veteran figures of the underworld would not refuse to acknowledge a new boss merely because the old one had been replaced—especially when the new boss was quite decent and had nothing to do with the old boss's death...
Oh, right. After gaining these new domains, the God of Knowledge's divine name also changed. His formal divine name was now the God of Knowledge and Culture. The former encompassed the acquisition, preservation, and dissemination of knowledge; the latter encompassed the study, preservation, and promotion of culture. Naturally, these could be further divided into several domains, enough even to elevate several subordinate gods.
According to the estimates of the well-traveled Justice God and God of Pleasure, given enough time to accumulate power, Vol could enter the ranks of powerful divine power solely on the strength of His current domains.
Probably... a thousand years or so would do.
A thousand years was truly nothing to immortal gods.
"It took me more than two thousand years from my ascension to godhood