I say to Nebu, Look there on the left there is a blue crystal. In the middle cave, there is no crystal. On the Right cave, there is a red crystal.
The Blue crystal represents the power of the light side of the force. The no color cave represents the one mentioned in the Star Wars rebels season 3. The Bendu. The Bendu says, I am the Bendu, I am the one in the middle. The red colored crystal stands for the power of the dark side of the force.
The light side of the force was originally called the Ashlay. The Bogan was the first name of the dark side of the force. In Star Wars rebels season two episode fourteen Legends of the Lasat There was a reference of the Ashlay. Ezra Bridger then says, What is the Ashlay? Kannan answers, there are many names for the force, and this is one of them.

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The Complete Guide
Historical FictionIn this guide you can learn the references, background stories, Easter eggs. This guide shows all references from both of the beginnings of the Jedi part one and part two. If you are interested in this be sure to check out this guide and my other st...