Core of the Promethium-Radium Crystal.

Summary

In a tense situation, Shen Ling Hao and friends express concern for each other's safety after a recent attack by evildoers. They credit Li Yu He for their survival and discuss their invulnerability due to a crystal source. As news of an alien invasion spreads, the school principal reassures the public while investigations continue. Chu Hao emphasizes the need for clarity regarding the crystal source and its connection to the aliens, urging his team to prepare for potential threats. A meeting at the research institute reveals the need for renewed battle readiness against the Praseodymium Hunters, with plans to protect various crystal sources and appoint new summoners. The atmosphere is serious as they prepare for the challenges ahead.

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