Black Clover

Synopsis

Lumiere honors Licht's request to kill him as he summons a giant light sword and reduces his friend's monstrous body to a skeleton. Secre retrieves the magic stones and stops Zagred from taking Licht's Grimoire while attempting to seal him, only for the devil to cast the resurrection spell to send himself and the elves five centuries into the future. Secre then petrifies the near dead Lumiere at his request and is turned into an Anti-bird for using forbidden magic. She then spends the next five centuries watching over Licht's Grimoire until Asta acquired it. In the present, Asta, Yuno and Patry catch up to the devil at the same time as Lumiere and Secre arrive, with Licht's soul fully awakened by their presence. As everyone teams up to fight, Zagred realizes Licht and Lumiere have become stronger due to being affected by his magic in the past while Asta's Anti-magic can stop his attacks. Zagred reveals his magic mass will continue to grow as long as he is alive, so Licht casts a spell, using the power of all the remaining elves to unlock the Demon Dweller Sword's true potential to obliterate him. Unfortunately Zagred's heart survives as he regenerates, revealing that no magic from their dimension can kill him. Asta realizes the Demon Slayer Sword must also have an ultimate power and that he must unlock it using a power no one else has.

(Source: Wikipedia)