If we follow Ji Xinghe's classification of Qi realms, only those who have reached the Seventh Stage Realm can achieve this capability. This is the reason why he placed his hopes on the King of the North.
Previously, achieving such abilities in the Sixth Stage Realm was impossible within the Empire.
Now, the Empire has discovered that as long as one possesses inherited power, they can have the combat strength of the Seventh Stage Realm while still in the Sixth Stage Realm.
As for the Second and Third Martial Emperors who inherited this power? The moment they received it, their Qi elevated to the Eighth Stage Realm, and after fully assimilating the inherited power, they reached the Ninth Stage Realm.
"I need the inherited power to kill Ji Xinghe. Yes, exactly. Without it, I can't kill Ji Xinghe. Going there would be a death sentence."
The Empire's Crown Prince, after considering his desperate intention, ultimately abandoned the thought.
