Jujutsu Kaisen Episode 51: Perfect Preparation

Maki arrives at the Zenin family's storage area for cursed tools and finds it occupied by her father, Ogi, who has just slashed Mai, leaving her bleeding heavily on the floor. Ogi attacks Maki with his sword, striking her down, then drags both daughters into a training room filled with cursed spirits, abandoning them to be devoured.

Maki lies unconscious as Mai, confirming her sister is still alive, decides to sacrifice herself; she channels all her cursed energy into creating a powerful sword using her Construction technique, which kills her. In a dreamlike vision on a sandy beach by the sea under cloudy skies, Mai explains to Maki that Jujutsu tradition views twins as a single entity whose potential is split between them—Maki received physical strength via Heavenly Restriction but no cursed energy, while Mai got the cursed energy—preventing either from reaching full potential alone.

Mai states that her death will make Maki "complete," freeing her Heavenly Restriction's full power, and urges Maki to destroy the Zenin clan from within to end their suffering; Maki vows to do so. Revived and empowered like Toji, Maki emerges from the room, slaughters the cursed spirits, and begins a brutal assault on the Zenin clan headquarters.

She fights and kills Ogi using taijutsu like Shiranui-Gata after he deploys Blazing Courage and Falling Blossom Emotion. Maki then massacres numerous clan members, including those using techniques like Chojuro's Earth Arms, Ranta's Paralyzing Gaze, and Jinichi's Missile Fist, wielding cursed tools such as the Dragon-Bone and Split Soul Katana.

Finally confronting Naoya, who uses Projection Sorcery, Maki overpowers and beats him into the ground after he mocks her. The episode depicts Maki's rampage eviscerating the entire Zenin clan in a relentless, Kill Bill-style onslaught.