Holocron fusion

A holocron fusion was the merger of a Jedi holocron and a Sith holocron, which could give those who performed it the answers to any questions they asked. It required a darksider and a lightsider to work together, one to open each holocron, so they were rarely performed. Ending the fusion before the holocrons were done could destroy the holocrons used, and cause the two Force users who performed it to get snippets of the information the other was searching for. It was also possible for strong emotions to affect the fusion, causing the answers given to be skewed. By the eve of the Galactic Civil War, knowledge of holocron fusions was rare.

Text and facts from the “Holocron fusion” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.