Intermédiaire
Was this the treasure Gin told you about? You stared at it, confused.
On the chest was an inconspicuous apparatus and a keyhole. They were hidden within the wood grain of the box, and if you hadn't looked closely, you would certainly have missed them.
You looked around for the ancient monster that supposedly guarded the treasure before proceeding. The coast was clear.
Fin
You rotated the chest slightly, and the ground began to shake. From beneath the earth, you heard a metallic clanking noise and the sound of gears gnashing against one another.
Suddenly, the shaking stopped, and an entrance appeared. You tried it, but it was firmly locked.
You needed a key to open the entrance. Maybe the key was in the dungeon? You remembered that Gin mentioned a red box containing a key.