- "That place… is strong with the dark side of the Force. A domain of evil it is. In you must go."
"What's in there?"
"Only what you take with you." - ―Yoda and Luke Skywalker
A duel took place in the Cave of Evil between Luke Skywalker and a vision of Darth Vader. It was part of Skywalker's Jedi training by Yoda because if he entered the cave, he could face his darkest fears. During the duel, Skywalker gained the upper hand and used his lightsaber to behead the illusion of Vader. When Vader's decapitated head hit the ground, the helmet exploded and revealed Skywalker's own countenance behind the mask. This showed that the illusory Sith Lord was meant to symbolize Skywalker's inner darkness inside the Cave of Evil.[1]