Hifuki no Kozuchi (火吹の小槌, Fire-Blowing Gavel; Viz "Fire Mallet") is a technique of Love Aikawa's Zanpakutō, Tengumaru.
Description[]
Swinging up Tengumaru, which ignites itself in flames, he points it down as a huge fireball is shot from the tip. Upon making contact with the target, the fireball explodes outwards, with the resulting blast caving in buildings near the center of impact. At the site of impact, a huge column of burning flames forms, further incinerating anything in the area.[1][2]