Great Blazing Sphere

Gouenkyuu (Great Blazing Sphere)
Ninjutsu (Katon; Requires Goukakyuu no Jutsu (5)) [Fire, Uchiha Itachi Hijutsu]
Rank: 9 (S-Class);
Range: 50-ft. long, 15-ft. wide line and 30-ft. radius burst emanating from the user;
Duration: Instantaneous;
Saving Throws: Reflex half;
Chakra Resistance: Yes;
Chakra Cost: 10.

This technique, created by the genius ninja Uchiha Itachi, is a vast improvement of the Uchiha clan's Goukakyuu. This technique deals 100 points of damage in a 15-ft. wide, 50-ft. long line of fire coming from the user, which can be halved with a successful Reflex save. When the line reaches its end, it explodes in a 30-ft. radius burst from its ending point. The damage dealt by this technique is either from the burst, or the line—both effects do not deal additional damage to a single creature.

Empower
The user can empower the technique to deal an additional 25 damage at the cost of 10 points of Chakra per 25 damage, up to 200 (maximum 25 per level).

Mastery
Each step of mastery in this technique allows the user to increase the length of the line by 5 feet, or the burst radius by 2 feet (rounded to the nearest 5-feet unit).