The Five-Leaf Clover

Plot:

Months after arriving at the Heart Kingdom, Asta still doesn't have any magic, but he's become more powerful at an alarming speed due to his training with the Spirit Guardians. Anti-magic is one of the magic attributes that falls into the "Arcane Stage" and is needed to defeat the devil. Because of that, Gaja asks Asta how exactly he obtained the five-leaf grimoire.