"This is going to be impossible in the dark" you think to yourself
Just as you are about to give up hope, you feel a waxy object mounted on the wall.
A candle! Exactly what you needed. You pull a book of matches out of your pocket and light it so it can lead your path.
Farther and farther into the cave you travel. Eventually, you run into a dead end.
You look down and find a treasure chest by your feet.
Open the chest
Check your surroundings before opening the chest