Kirby uses a flaming sword that can be thrown by pressing Up and then either Left or Right on the + Control Pad.”
— Description • Official Strategy guide
Sword of Fire is a combination ability used in Kirby 64: The Crystal Shards made by mixing the Burning and Cutter abilities. With it, Kirby uses a flaming sword to attack enemies. Kirby can also throw the sword of fire at enemies. The one catch is that when he is holding the fire sword, he can't fly. The sword can be used underwater.