"S-She what?" Allen couldn't believe what he just heard from the twins.
"Leo wanted to end everything in their planet," Ash said. "He realized the Gems could actually defeat the final boss, that was why he wanted to end them."
"And to do that, he needed to sabotage them," Corry continued. "He chose one of the two strongest Hunters in their planet, Chara and the tasked her to plot an issue among the gems so they would fight each other. He succeeded."
"So, the gems killed each other off?" Jeremy asked, making Ash nod.
Corry tapped his sister's shoulder and smiled at her bitterly. "Yes. The gems killed each other. Without them, the planet didn't have anyone stong enough to reach the final world. Their trial period ended and they all perished."