1)Katon:Goukakyuu no Jutsu
Fire style:Grand Fire ball Jutsu
The user charges chakra in there stomach and after using the appropriate hand seals forces it out and the chakra becomes flame which shoot out and build to a Gigantic ball of flame and shoot at the opponent.
2)Katon:Ryuuka no Jutsu
Fire style:Dragon Flame Jutsu
The user charges Chakra like the above,But the user can send flame down a string to the opponent after using the appropriate hand seals.
3)Katon:Karyuu Endan
Fire style:Dragon Flame Bomb
Charging chakra like the ones above the user shoots a fierce flame in a wide straight line to the target.
4)Katon:Housenka no Jutsu
Fire style:Phoenix Flower jutsu
After charging like the above the user fires off several more fist-sized balls of fire that rocket towards the target.