Minor Fire Ball Technique
Ninjutsu (Katon) [Fire]
Rank: 2 (D-Class);
Learn DC: 14, 1 success;
Perform requirements: 4 ranks (DC 13);
Time: 1 attack action;
Components: C, H, E;
Range: 5 ft./2 levels;
Area: 5-ft. wide line;
Duration: Instantaneous;
Saving Throws: Reflex half;
Chakra Resistance: Yes;
Chakra Cost: 10.
The far more known, and incidentally much less damaging, lower-ranked counterpart to Goukakyuu no Jutsu has the user spit out a ball of flame in a small line.
Any creature caught in the area of effect suffers 2d4+2 points of fire damage that can be halved with a successful reflex save. The line cannot extend farther than 30 feet.
Empower
The user may chose to spend 4 additional points of Chakra to increase the damage by 1d4+1, up to 1d4+1 per level, maximum 5d4+5.