Watch this comparison of the anime episode and its manga origins to see how Gen's brush with death was adapted:
While Gen is staying with Senku, he is brutally ambushed by Magma , a powerful warrior from Ishigami Village who mistakes Gen for the "sorcerer" (Senku). Gen survives the lethal-looking attack by using hidden bags of fake blood to deceive his assailant. Dr. Stone Episode 10
In , titled "A Flimsy Alliance" (or "A Tenuous Alliance"), the story focuses on the mentalist Gen Asagiri and his crucial decision to switch sides from Tsukasa’s Empire to Senku’s Kingdom of Science . Key Plot Points Watch this comparison of the anime episode and
To prevent Magma from winning and to save Ruri's life, Kohaku begins training Kinro and Ginro for the tournament. Chrome, though initially jealous, sets aside his feelings to focus on helping Senku develop a scientific cure for Ruri’s illness. Key Plot Points To prevent Magma from winning
It is revealed that Magma wants to win the upcoming Grand Bout , a tournament to decide the next village elder. Winning would allow him to marry Ruri , the current priestess, but his true goal is power; he even plots to eliminate Ruri after the marriage.
Gen returns to Tsukasa’s headquarters and reports that Senku is dead , effectively buying the Kingdom of Science more time to prepare for the inevitable conflict.