Apart from using Four Heads Eight Arms and Eight Tusk Divine Strength to increase his strength, Su Zimo attacked one of the Kun Kings with the remaining six peerless divine powers without holding back!
The three Kun Kings stood in three different positions.
If the six peerless divine powers were dispersed, it would be equivalent to their powers divided against the three Grotto-heavens and there was a high chance that they would not cause any commotion.
The safest way was to pour everything on a single Kun King!
The Immortal Vanquishing Sword was extremely lethal, the Buddha Dragon Elephant shook the void, the Six Paths of Reincarnation devoured everything, the Vermilion Bird Heavenly Fire incinerated everything and Infinite Yin Yang crushed the world.
Coupled with the restriction of Astral Imprisonment, although it only had a momentary effect on the Kun King, it was enough.