Brain-Battle Gambit (頭脳戦のディールゲーム Zunō-sen no Dīrugēmu) is the 123rd chapter of the Dr. Stone manga.


In his opening move to convince Mozu to join forces with the Kingdom of Science, Gen performs magic tricks while Senku demonstrates the scientific power of their drone. Gen then employs a number of psychological manipulation techniques, hoping to get him to talk.

Mozu admits that he's not allied with Minister Ibara, and that he doesn't rebel due to the power of the Petrification Weapon that Kirisame possesses. Senku claims that their goals are aligned, but Gen demands that they must receive the Petrification Weapon should they ally. Mozu refuses, stating that he must be the one to receive the weapon. Gen's demand was another manipulation technique, successfully securing the alliance with Mozu by having him focus on the terms. The other members of the Kingdom of Science congratulate an exhausted Gen.

The Kingdom of Science disguise their new ally as an invader, hoping to have him stir up rumors of their own strength.

Characters in Order of Appearance

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Source of the Petrification Saga
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