The rustling fruit serum was temporarily put away by Kahn. His goal for the natural department was the thunder fruit, but he had to find out whether the bloodline factor of the natural devil fruit was unique in the gene chain. If it could not be covered, it could only be Take a Devil Fruit.

Regarding the statement that two Devil Fruits cannot be eaten at the same time, Kahn suspects that eating two Devil Fruits will lead to the collapse of the genetic chain conflict. Before solving this problem, Kahn does not intend to eat the second one.

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