With the strength of that old couple, if they fell into an array set up by a low-level Array Master, they might be able to break it with brute force.
But the Greater Demon Trapping Formation set up by Fang Bai could trap even a Nascent Soul Perfection expert for an hour or two, let alone a Nascent Soul early-stage expert like that old couple.
Fang Bai estimated that once the old couple fell into the Greater Demon Trapping Formation, it would take them at least half a day to break out.
And with this half a day, it would be enough for Fang Bai and He Wujie to delve into the Great Tomb.
After the old couple was trapped in the Greater Demon Trapping Formation, worried that the cultivation resources in the Great Tomb would fall into the hands of He Wujie and Fang Bai, they were immediately extremely anxious and launched a fierce attack, hoping to break through the formation and kill Fang Bai and He Wujie.
