It's often said that evil needs evil to subdue it.
The Sea God was born with an extremely poor reputation, whether it was kicking over the Crystal Palace while playing in the sea, or skinning and extracting the tendons of the Dragon King's son, or when the Dragon King went to the heavens to file a complaint, blocking him at the heavenly gate and beating him up, threatening him not to report to the heavens...
Every single one of these actions seems like something a good person would never do!
Later, the Sea God killed Bi Yun Tongzi, not only did he not have to repay with his life, but he also transformed into a disaster-attuned killing star.
Born with a quota of three thousand calamities, if you die at his hands within this quota, it was a destined calamity.
Besides, the Sea God could be ruthless enough not to spare even himself!