In Episode 103, titled " Release from Misfortune ," Asta discovers a game-changing power that turns the tide of the elf reincarnation crisis. The Demon-Destroyer Sword's True Power
: Recognizing the scale of the invasion, Asta and Yuno decide to part ways to cover more ground. Yuno literally "kicks" Asta out of his wind ark to send him toward a separate high-mana signature.
The centerpiece of the episode is Asta’s mastery over his third sword, the . After its appearance in the previous battle, Asta learns to control its unique ability: Causality Break .
With Hage Village safe, the duo prepares for the next phase of the war:
: Asta uses the sword to absorb and negate the magical poison infecting the villagers of Hage, including his foster father, Father Orsi . Victory in Hage Village
: Unlike his other swords, this one can negate the effects of magic already cast, allowing Asta to forcibly remove reincarnated elf souls from human bodies without killing the host.