Ki Charge

A ninja with this trick can invest a portion of her ki into a single thrown weapon, such as a shuriken, and throw it as a standard action. The thrown weapon explodes on impact in a 5-foot burst, dealing 1d6 points of fire damage plus 1d6 points of fire damage for every four levels of the ninja above 2nd, to a maximum 4d6 at 18th level. Creatures caught in the blast receive a Reflex save to halve the damage. The DC of this save is 10 + 1/2 the ninja's level + the ninja's Charisma modifier. If the thrown weapon hits a creature, that creature takes a –2 penalty on the saving throw. If the thrown weapon misses, treat it as a thrown splash weapon. Using this ability expends 1 ki point from her ki pool.