I know I keep bringing up Races of the Dragon but, hey, Pathfinder is built on 3.5, so it works mechanically without much change...
They do a line of whatever element you chose at character creation, 5ft per HD, 1d8 damage per 3 HD (2d8 at 3HD, 3d8 at 6 HD, etc). Reflex save (DC 10 + 1/2...