There are few beings in the Dragon Ball mythos more powerful than a Legendary Super Saiyan, though Dragon Ball Super revealed the one way to take them down–a method that is greatly effective in more ways than one.
A Legendary Super Saiyan is an extremely powerful and incredibly rare Super Saiyan form that only manifests in a Saiyan every one thousand years. Once the Saiyan in question undergoes the transformation into Legendary Super Saiyan, they enter a kind of berserker state in which they have little to no control over their actions. While in this state, the Legendary Super Saiyan is seemingly tapped into an unlimited supply of energy, making them practically invincible.
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In Dragon Ball Super Chapter 38 by Akira Toriyama and Toyotarou, Goku, Vegeta, and the rest of the Z Fighters encounter their first Legendary Super Saiyan during the Tournament of Power, a Saiyan from Universe 6 named Kale. Going into the tournament, Kale and her fellow teammates didn’t know she was a Legendary Super Saiyan, though every participant quickly learned that’s exactly what she was after she made the transformation and single-handedly eliminated nearly half of the fighters in the arena. While that seemed like a good thing for Universe 6, one of the tournament rules was that no killing was allowed, and it was only a matter of time before Kale’s power grew too great to contain and she would accidentally kill someone during her berserker rampage. In order to stop Kale without eliminating her from the competition, her teammate, Caulifla, used her Supreme Kai’s Potara Earrings to fuse with Kale so that Caulifla could take control over her mind without losing too much of Kale’s
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