This was a planned world. It was a world in which God made the rules and everything had to follow the game plan.
When all the human warriors had appeared in this world, a game of life and death would begin. All human ancient martial arts practitioners had a common task, which was to kill the Seventh rank fire domain beast king and to gain the spiritual fire. If they failed to do that, then they would all be killed.
In this world, death was the final ending.
The tower spirit had given them three days. During that time, the ancient martial arts practitioners could kill the illusionary beasts to lift their cultivation bans. Those who did not already have high enough cultivation could kill the illusionary beasts to increase their cultivation levels.