It bundles disconnected flashbacks from episodes 117 and 118 into a single, cohesive narrative of the past. Quick Stats:
Nero, Tsuikai soshite... Zenpen (ネロ、追懐そして... 前編) Release Date: February 25, 2020 Arc: Elf Reincarnation Arc Where to Watch: Available on Crunchyroll Black Clover (TV) Episode 123
Fans noted that while it was a recap, it introduced a new opening theme with updated visuals. It bundles disconnected flashbacks from episodes 117 and
The episode provides a chronological look at Nero’s 500-year vigil as an Anti-Bird, revealing her deep devotion to her original mission. Black Clover (TV) Episode 123
If you've been watching consistently, you can skip most of this episode as it contains roughly 90% previously-aired footage. However, completionists will appreciate the 10% new animation and Secre's internal monologue.