Using this opportunity, Inarius shielded the Worldstone's presence with Mount Arreat and then formed Sanctuary around it D2R Items. And then, Inarius redirected the Worldstone's energies into himself, becoming the strongest being in Sanctuary.

6 Inarius Had Conflicted Feelings With The Nephalem
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.

5 Inarius Fought A Cold War
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 buy D2R ladder items, the Cathedral of Light, based on the High Heavens' teachings.