With everybody clamoring to pick their own tunnels to go through, the whole mushroom forest began to quake with shoutings and arguments.
"Everybody, settle down," said one of the adventurers. "I know that we would all like to pick our own tunnels, but how do we decide among us who will be the first to choose? It's only fair that we go through our Golden 500 rankings!"
Once he said that, everybody began to calm down.
It was widely known that the stronger the guardian, the better the treasure. So, it was only natural that those who had the power and ability to fight those strong guardians would pick tunnels with the appropriate difficulty. This would leave the weaker tunnels to the weaker adventuring party or companies.
"I agree with this."
"It's only natural for the strong to pick first."
Once that was settled everyone turned to the Rising Six, the best up and coming companies in Metropolis.