Ep. 71: Mereoleona forces Asta and Yuno to endure hot spring training on a volcano.

Mereoleona, the violent older sister of Fuegoleon, commands Asta and Yuno to join her Lions for intense hot spring training. She also captures Yami, Charlotte, Sol Marron, and Noelle, insisting they all participate. The Wizard King observes their departure while disguised as a bartender. The training location is atop the Yultim Volcano, which constantly erupts and sits above a mana-rich well. Despite extreme heat, the group races upward using magic for protection. Yami recognizes this as the core of Mereoleona's training method. Noelle gains determination after Mereoleona compliments her resemblance to her mother. Asta discovers his swords are ineffective against the natural heat and nearly faints. Although Mereoleona suggests he quit, Asta resolves to reach the summit using only his physical strength.

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