Krune's strength had already reached the Elementary God Realm due to his various complementary abilities. So, when tens of thousands of his clones with the same power launched an attack, the effect was staggering, almost enough for the Primal Gods to take things seriously.
After all, he was attacking using tribulation lightning that would mess up and vaporize their Spiritual Incarnation if they were careless.
For a moment, the Primal Gods had to stop their attacks and focus on defending themselves, grunting as the penetrative beams of tribulation lightning slammed into their protective shields, beginning to penetrate through them while vaporizing their surroundings.