This is sealed with an official name designated in the newest chapter of the series, the Demon-Slasher Katana. Chapter 271 picks up immediately after the end of the Devil-Binding Ritual as Nacht now will begin training Asta and his devil how to use their abilities to the fullest.

Does Asta get Yamis sword?

Black Clover recently got through with one of Asta's toughest battle yet, and although it's come under terrible circumstance, the newest chapter of the series revealed that Asta has acquired a new demon sword. ... In the process, their teamwork had Asta fill Yami's sword with his anti-magic power to land that last attack.

What episode does Asta get his new sword?

Here is everything you need to know about his new Demon-Destroyer sword. In episode 100 of Black Cover, Asta takes the Demon-Destroyer sword from an Elf named Licht during battle after noticing it absorbed his and Yuno's magic, strengthening the villain's attacks exponentially.