Ep 21. Strong x Or x Weak

Gon and Killua continue their training with Biscuit, focusing on improving their physical strength and learning new techniques. Meanwhile, the Phantom Troupe has arrived in a small town and quickly attracts attention with their odd behavior. Kurapika, still determined to seek revenge against the group for their massacre of his clan, travels to the same town disguised as a bodyguard for a wealthy businessman. When he discovers the Phantom Troupe's presence, he begins to plan his attack.

As the boys train and the Phantom Troupe makes their move, a group of hunters arrive in the town investigating the strange occurrences. Among them is Knov, a skilled manipulator of space who is assigned to infiltrate the area and gather information. His abilities allow him to create a secret portal within a closet in the hotel where the Troupe is staying, and he begins to observe them from a distance.

As night falls, the Phantom Troupe makes their move and confronts the powerful mafia group running the town. Their leader, Chrollo, easily dispatches several mafia members with his Nen abilities, leaving the rest in a state of shock. Kurapika, observing from the shadows, becomes furious at not being able to take action and vows to fight them no matter what.

Meanwhile, Gon and Killua continue their training, pushing their bodies to the limit and learning new techniques. Biscuit is impressed with their progress but warns them not to become too prideful and overconfident. However, she notices that Gon's determination and strong will are starting to develop an ominous aura, and becomes concerned about his mental state.

As the night progresses, the Troupe's confrontation with the mafia becomes more intense, with Chrollo displaying his incredible power. However, just as things seem to be going in the Troupe's favor, a new figure appears on the scene. His identity and motives are unknown, but his appearance sends shockwaves through the town and sets the stage for an epic confrontation.

Overall, "Strong x Or x Weak" is a tense and action-packed episode that sets up numerous plot threads for the rest of the season. The focus on training and the contrast with the Phantom Troupe's power serve as a reminder of the heights that Gon and Killua must reach in order to succeed in their quests. Meanwhile, Kurapika's determination and Knov's surreptitious spying hint at the larger conflicts that are brewing just beneath the surface of the story. Fans of the series will no doubt be eager to see where these threads lead.