Tantrum

'Immortal Monarch? Who is that?' Yu Ning raised her eyebrows in a puzzled manner, as she'd never heard of this individual before. 

Since the Immortal Monarch came into existence way after the Heavenly War of Immortals and Gods, there was simply no way for those within the Shadow Realm to know of him.

Despite the occasional tales of the Divine Heavens splitting into the Nine Heavens being told by those who ventured into the Shadow Realm throughout the years, the Immortal Monarch's name never found its way into these discussions, leaving a void of knowledge in the Shadow Realm.

With that being said, there were names that Yuan uttered that sounded familiar to Yu Ning.