The western testing grounds inside Minerva's Utopia.
It was a place known as Mini Monster Canyon in that its entrance was just like the Monster Canyon found outside the separate dimension. However, the size of this Monster Canyon was relatively smaller and the monsters were only restricted to being plant-based monsters.
It was called a Test of Courage for the simple fact that the plant-based monsters had created their unique hierarchies inside the Mini Monster Canyon. The monsters and the participants were not separated according to their rank. Any ranker could face a monster of any level.
The Mini Monster Canyon had an invisible spatial barrier that rippled every time the rankers stepped forward to enter the canyon. Upon crossing that spatial barrier, they would be teleported to anywhere inside the Mini Monster Canyon.
