Fang Lin couldn't leave the Demon Clan's Sacred Tree, as there was a seal left by Fang Qingye. Unless Fang Lin reached the same level of power as Fang Qingye, or even surpassed him, he simply couldn't leave the Demon Clan's Sacred Tree.
This was also Fang Qingye's primary goal for this journey. If Fang Lin had no way to take that step, the entire world would fall into complete silence, where no one could survive. Only by hiding within the Demon Clan's Sacred Tree could one continue to live.
Fang Qingye had painstakingly good intentions. He didn't care whether Fang Lin could succeed in taking that step. He only hoped that his son could live well, even if he was the only one left in this world.
The Demon Clan's Sacred Tree was an existence equal to the Ancient Spirit of Mountain Tu. No matter how powerful the Ancient Spirit of Mountain Tu was, it could do nothing to the Demon Clan's Sacred Tree.
