During the battle to besiege the Western Abyss Dragon Palace all those years ago, the Annihilation Thunder God had killed the strongest member of the Golden-Winged Heavenly Ape Clan, along with ten Earth Immortal Ancestors. He had nearly wiped out most of the clan's high-ranking experts.
Such a grudge had naturally made the Golden-Winged Heavenly Ape Clan hate the Myriad Tribulations Thunder Sea to the bone.
The divine being they were besieging now was a Thunder Tribulation Divine Spirit from the Myriad Tribulations Thunder Sea.
Chen Nianzhi had seen him before. When Chen Nianzhi had infiltrated the Ninefold Thunder Abyss, this Thunder Tribulation Divine Spirit had still been an Eight-Tribulation divine being. Chen Nianzhi hadn't attacked him, lest he alert the Annihilation Thunder God.
Later, when disaster erupted in the Ninefold Thunder Abyss, the Thunder Tribulation Divine Spirit had suffered severe injuries. Fortunately, he had followed the Annihilation Thunder God, and with the support of that half-step Heavenly Immortal, he had recovered before long.
Not long afterward, to support this Thunder Tribulation Divine Spirit, the Annihilation Thunder God had personally attacked the Golden-Winged Heavenly Ape Clan's branch, killing ten of their Earth Immortal Ancestors. He had even obtained an Eight-Tribulation Source of Dao.
With that Eight-Tribulation Source of Dao, the Thunder Tribulation Divine Spirit had reached the Nine-Tribulation realm. Before long, he had broken through to Earth Immortal and opened eight layers of heaven and earth.
Unfortunately, his good fortune hadn't lasted. Not long afterward, the Western Abyss Dragon King had broken through to the Heavenly Immortal realm, and the situation had taken a sudden turn for the worse.
After the great battle back then, the Annihilation Thunder God had been gravely wounded and vanished without a trace. Clearly, he had hidden himself in the West Qi Divine Abyss Sea.