The Extinction of Heaven and Earth technique that Song Haiyun wielded was a kind of secret technique.
Once this secret technique was unleashed, it would instantly deplete the user's lifespan and spiritual energy completely.
When the effect of the secret technique wore off, the user's body would disintegrate and die in an instant, which was why Song Haiyun had spoken of perishing together.
Song Haiyun was truly a master of the Initial Stage of Nirvana Realm's Fourth Heaven, while those present like Wu Qingshan, Zuo Deyuan, the Silver-bodied Sea Python, and the Sea King Giant Scorpion could not match Song Haiyun in terms of strength.
The Extinction of Heaven and Earth, executed by Song Haiyun at the cost of his lifespan, was definitely not something that a master of the Nirvana Realm Third Heaven could resist.
This Extinction of Heaven and Earth could temporarily obscure the sky, bringing temporary death to the earth.
