Using this Diablo IV Gold opportunity, Inarius shielded the Worldstone's presence with Mount Arreat and then formed Sanctuary around it. And then, Inarius redirected the Worldstone's energies into himself, becoming the strongest being in Sanctuary.
When the renegade angels and demons discovered the potential of the Nephalem, most of them advocated for their destruction. However, instead of following their suggestions, Inarius decided to meditate on the thought. After Lilith slaughtered Inarius' followers at the suggestion of genocide, Inarius relented and instead sealed the Nephalem's powers for good.
This move was particularly interesting for Inarius. Despite his perceived pride and arrogance, he couldn't blatantly kill the Nephalem outright. However, Inarius seems unbothered at the notion of having to kill the Nephalem, should the need arise.
Inarius fought in a cold war of sorts against the Prime Evils in Sanctuary. In fact, it's the Prime Evils who first discovered the existence of Sanctuary and the potential of the Nephalem. Hoping to influence them to their favor, the Prime Evils formed a religion around them called the Triune.
However, Inarius caught wind of their plans and created his own organization, the Cathedral of Light, based on the High Heavens' teachings.
Inarius seems to have made the Cathedral not out of benevolence. Rather, Inarius wanted to secure the safety of the Nephalem by not attracting the forces of the High Heavens. The formation of the Cathedral served as a sign of cheap Diablo 4 Gold Inarius' growing fear of the High Heavens' retaliation if they discover the Nephalem.