Ares was astonished that Astraeus actually suggested he kill the envoys of the Divine Realm!
Throughout history, countless Soulmancers have yearned to enter the Divine Realm, as the secrets to enhancing one's strength in the Prime World are incomplete.
To truly gain access to greater mystical arts, the Divine Realm seemed the only other option.
Similarly, when Soulmancers in the Prime World reach the Quasi-Deity level, envoys from the Divine Realm typically seek them out, often urging or leading them to the Divine Realm.
It's commonly understood that only those who have attained the Quasi-Deity level know that the first requirement to enter the Divine Realm is to abandon their current physical form, entering in a soul state to then reconstruct their body through the power of the soul.
The true nature of the Divine Realm remains a mystery.