The Tower is not a pure "Trial of Light";
The "Cage of Light" set up by the Dark Emperor Ampera
The light of the nine Ultramen was imprisoned and cut by the tower
Cut and package them into trial rewards and pass them on to fitness
who.
The fittest people continue to fight monsters under the guidance of the tower
Fight, the fear, despair, and sacrifice caused by fighting
The negative energy is secretly absorbed by the tower and becomes An
Pella descends upon the earth as nourishment.
In other words:
The tower cultivates heroes on the surface, but actually traps light and collects it.
Cut the darkness.