Right Arm of the Giant, Left Arm of the Devil

A stretch of comic relief opens the episode as Pesche Guatiche produces a slippery fluid he dubs Infinite Slick, then realizes it is only mucus and wipes it on Uryū's cape, sending the disgusted Quincy fleeing. The tone shifts sharply when Uryū senses Yasutora Sado's surging Reiatsu nearby.

Facing Gantenbainne Mosqueda, Sado reveals that his strange power had stirred to life the moment he set foot in Hueco Mundo, and he now understands that it resembles a Hollow's rather than a Shinigami's or Quincy's. Naming his right arm Brazo Derecha de Gigante, he batters Gantenbainne around the hall with amplified El Directo blasts and heavy punches, repeatedly outpacing the Arrancar's Sonído.

When Gantenbainne resorts to his Resurrección, Dragra, Sado answers by manifesting his left arm, Brazo Izquierda del Diablo, the offensive counterpart that holds his true striking power. He crushes and swats aside every energy attack, then ends the fight with La Muerte, shattering Dragra and branding a fearsome skull into the wall. Sparing his beaten foe out of gratitude, Sado steps outside beneath a false blue sky and is confronted by the far deadlier Nnoitra Gilga, whose chest shrugs off his hardest blow.

Sado recognizes the Hollow-like nature of his Fullbring and unveils both halves of it: the defensive Brazo Derecha de Gigante and the offensive Brazo Izquierda del Diablo. He overwhelms Gantenbainne and finishes the fight with La Muerte, but chooses to spare the Arrancar for making him stronger. Nnoitra Gilga then appears and withstands Sado's strongest attack without a scratch, instantly turning the tables.

Episode 158 adapts chapters 260 and 261 during the first Hueco Mundo invasion. The Quincy Encyclopedia skit features Ryūken lecturing a reclining Isshin about the Seele Schneider before firing one at him. The anime padded the bout with additional punches, flashbacks to Sado awakening his power against Bulbous G, and Oscar Joaquín de la Rosa's lesson about the purpose of his strong arms.