Spontaneous Immolation

Evocation [fire]
Level: Artificer * 2, Sorcerer */Wizard * 2
Components: V, S, M (pinch of saltpeter)
Casting Time: 1 Standard Action
Range: medium (100 ft. + 10 ft./level)
Target: one creature
Duration: instantaneous
Saving Throw: Fortitude half and Reflex, see text
Spell Resistance: yes
  You point your finger at a creature, causing it to spontaneously burst into flame. The target takes 3d6 points of fire damage and catches on fire (Pathfinder RPG Core Rulebook 444). A successful Fortitude Save reduces this damage by half and prevents the target from Catching On Fire. Each round on your turn, a burning target can attempt a new save to extinguish the flames (DC equal to the DC of the spell otherwise it takes another 1d6 fire damage.