Everything had been within his calculations. After luring those Devil Race ancestors inside, they had indeed quickly dealt with the Thunderbolt Spear. Though the Thunderbolt Spear possessed profound power and was even stronger than those Devil Race ancestors, and had the advantage of the terrain, the enemy simply outnumbered it by far.
As a result, the Thunderbolt Spear had been heavily injured with ease. Then, just as they were about to take the Thunderbolt Spear away, the Demon Sovereign's Successor had seized the initiative, opened the Devil Lord's true treasure vault, and fled all the way inside.
Meanwhile, the Devil Race ancestors behind him were trapped by the formations scattered throughout the treasure vault and could not catch up at all.
They were scattered everywhere and posed no fundamental threat to him whatsoever.
And by the time they arrived here, he would have thoroughly refined the Thunderbolt Spear. Once he controlled the entire Devil Race treasure vault, those Devil Race ancestors would be walking straight into death. How could they possibly be his match?
At that point, he would be the true master of the treasure vault. He could mobilize the entire vault to strangle them. By then, no matter how many people came, there would not be enough lives to lose.
This treasure vault and its various restrictions had been established by the Devil Lord. Compared to the Devil Lord, these people were nothing more than ants.
The only person he was worried about was Ye Xiwen. Ye Xiwen also claimed to be the Devil Lord's successor, and more importantly, he had actually made the Nine Underworlds Nether King Banner betray him. Yes, in his eyes, the Nine Underworlds Nether King Banner had actually rebelled. That in itself was an unimaginable matter.
He was not particularly surprised by a