As Mars turns his sights on the injured girls, Asta is thrown through a wall into a separate chamber. Nero finds him and leads him to a dirt-covered, rusted sword.

: Encouraged by a wounded Noelle, the sword begins to glow with her water mana. Asta swings the blade, releasing a powerful torrent of water that finally extinguishes Mars’ healing flames and strikes him down. The Aftermath

: While exploring, Yuno finds a strange scroll with mysterious writing that glows and then vanishes into his grimoire, hinting at a new power.

: The anti-bird Nero tries to lead Asta toward a specific spot on the wall, but Asta is too distracted by the treasure to understand. Mars Returns

: Returning to the fray with this new weapon, Asta discovers it can "borrow" the magic of others.