What sort of place was the Great Sky Paradise? It was the foundation of the Great Sky Heavenly Venerate. Although he was a Heavenly Venerate, many things relied on the Great Sky Paradise.
Disciple training and medicine production couldn't be done away from the Great Sky Paradise. Although Heavenly Venerates were powerful, they too faced all sorts of threats, especially from Heavenly Tribulation. If a Heavenly Venerate wasn't able to survive one, their many years of cultivation would go down the drain as they turned to dust.
To survive through Heavenly Tribulation, a huge amount of resources were needed on top of raising one's cultivation base. The Great Sky Paradise was a foundation that provided him with the most resources.
Now, this foundation had been destroyed with one blade strike. The Great Sky Heavenly Venerate practically felt his heart shattering. He pointed at Luo Yunyang and bellowed furiously, "Bastard, you are asking to die!"