Black Clover Chapter 389 : Supreme Achievement.

There’s no backstory, no Astaroth, no nothing by the way.

Lucius disintegrates after Julius lectures him.

Julius praises William and Yami, for the magic knights they have guided made it this far.

He then goes on to praise Asta and Yuno, telling them they’ve achieved the greatest merit.

Julius remarks to himself that the final blow by Asta & Yuno was executed such that only Lucius was cut down (by the devil), and Julius saved (by the spirit).
We see Sekke lying on the ground beat up… he says “Damn…. I wanna be stronger….”

Mereo, Fuego, Leo exchange.

Mereo praises her brothers; she then says her magic is about to wear off and there’s no body for her to return to & she’s on the verge of death…

Julius’ takes his coverless grimoire out, and he’s using a massive spell to restore the Kingdom.
He also restores Mereo’s body, Jack, Marx also back.
“Julius says restoring the kingdom is his final duty as Wizard King. “I leave the rest to you” he says”,and dies.

Black Clover Super Climax in Spring GIGA, also called a “Black Clover Special Feature”. BC is getting both the GIGA cover + lead colour page.
Author comment by Tabata-sensei: “A friend I went to middle school with passed away from illness. Once I finish drawing Black Clover, I’m going to go and meet some friends of mine.”
We never got to see fully manifested Lucifero with Grimoire.
It does not say “this is gonna be the last chapter”, but I guess it is pretty likely at this point. Might also get some epilogue after that in the summer, who knows.