From MC's Perspective:
Elder Paul Lin then led me towards the Treasure Vault. The Treasure Vault is located in a secret place. He followed me through several different corridors before we arrived in front of a huge room.
I couldn't even remember the actual route leading to this room. Then I realized some kind of magic is involved. Otherwise, it's impossible for me to forget the route. The system didn't even warn me.
Which shows that whatever magic was cast here. It's not directed against anyone. But it was placed on the path leading to the treasure vault.
Paul Lin took out a black token before accessing something online.
Buzz!
A sound came from the huge room in front of us. A door layout appears, and it has a slot for the token.
Seeing that I immediately thought it must be the key to unlock the treasure vault door.
Paul Lin inserted the Black token in it. The Token went inside, causing another buzzing sound.
Creak!