uncommon evocation fire sorcerer 

Bloodline phoenix

Cast [>>] somatic, verbal

Area 10-foot emanation

Duration sustained up to 1 minute

You encircle yourself in an aura of protective flames.

Each creature that hits you with an unarmed attack, Grapples you, or otherwise touches you takes 3 fire damage. When you Cast the Spell and the first time you sustain it each round, each creature in the area takes 3d6 fire damage (basic Reflex save).

Heightened (+1) The damage caused by touching you increases by 1, and the fire damage when you Cast the Spell or sustain it increases by 1d6.

Fists of the Ruby Phoenix #3: King of the Mountain, page 74.