This door was something Buddha acquired by chance in the Returning Ruins years ago.
It's just like Wa Huang's Five-Colored Stone, usually unused, and he didn't know how to use it.
Only when pushed to the brink did he take it out to use.
Even Buddha's ally, the Demon Lord, had no idea that Buddha possessed this item.
Indeed, even before releasing the Chaos Star Beast, Buddha kept the existence of this black door hidden from the Demon Lord.
It wasn't until the Chaos Star Beast was released and the existence of this black door couldn't be kept secret anymore that the Demon Lord found out.
Even an ally like the Demon Lord was kept in the dark by Buddha.
Let alone Lin Yuan and the others.
When Lin Yuan and Yang Jing saw this black door, they were as clueless as ever, not knowing what it was.
Lin Yuan tried to push the black door, but it remained unmoved.
"Bang!"
Lin Yuan hit the black door hard with a punch, yet the door remained unresponsive.
