In the Upper Three Realms, cultivators work on their Divine Sense, which is a fact known to every Martial Artist, and to break through to the War Venerate, one must form a Soul Seed within the Sea of Consciousness.
The Soul Seed is the foundation of the Upper Three Realms, formed from Divine Sense, and the cultivation in the Upper Three Realms revolves around strengthening the Soul Seed step by step. Therefore, even if one hasn't cultivated an Intent Realm, it doesn't matter; the Soul Seed can protect the Divine Sense and resist attacks from Intent Realms.
What is so-called cultivation of Divine Sense in the Upper Three Realms is actually the mastery of Elementals, but how does one cultivate and use this?
It can be achieved through the Soul Seed.