Sticky Fire Technique

Enkounebai no Jutsu (Sticky Fire Technique)
Ninjutsu (Katon) [Fire]
Rank: 2 (D-Class);
Range: Close (10 ft. + 5 ft./2 levels);
Target: One creature caught on fire;
Duration: 1 post/level;
Saving Throws: Fortitude negates;
Chakra Resistance: Yes;
Chakra Cost: 3.

Using this technique on a creature currently caught on fire, the user is able to increase the potency and durability. The creature's Reflex save to put out the fire increases by 3, and the fire damage dealt each round gets a +10 bonus.