Asta's relationship with the entity inside his body seems to be somewhat reminiscent of that between Naruto and the nine-tailed fox. Asta unintentionally gains demonic power and manages to strengthen his body by using this ability several times. However, much is not yet known about this relationship Black clover.
Yuki Tabata seems to have decided to finally lead the fans to an explanation of this relationship between Asta and the unknown demon. Black clover 258 he threw the protagonist into the fight against Dante again. The monstrous being at the helm doesn't seem to defeat Yami Sukehiro despite the strong captain.
Because of this, during the collision, Asta decides to appeal to her inner demonand asked him enough strength to face the fight. The still nameless devil decides to consciously grant him part of the power, but only in exchange for part of the boy's body, a real pact with the devil.
This inner discussion then really triggers the dark power over the boy's body The last page of Black Clover 258 dealt with the transformation of Asta. The protagonist has thus opened up new opportunities for his future.
