According to his understanding, only the True Immortal Realm possesses the trait of being forgotten upon sight.
Once, his realm was insufficient; no matter how many times he saw the Moon Palace lady, he would forget in a flash.
Yet this time is different.
After becoming an Immortal of the Primordial Spirit, he discovered he could no longer forget the face of the Moon Palace lady.
If this Moon Palace lady belongs to the True Immortal Realm of the Third Realm of Immortal Dao, it implies that in her eyes, the Martial Path pursued by the Martial Saint is only limited by lifespan; with enough lifespan, the Martial Saint could reach the level of a True Immortal comparable to the Third Realm of Immortal Dao.
From this point, he could also understand why the Martial Saint was so strong; the potential to be on par with True Immortals means that at peak strength, one is likely to possess the combat power of the Second Realm of Immortal Dao, the Heavenly Immortal Realm!
