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From Pathfinder Rage of Elements, which isn't enabled.

Fire Warden

BACKGROUND
Attribute Boosts Constitution or Strength, free
Skills Athletics, Plane of Fire Lore

Whether you fought against fires in the wilderness or in crowded city streets, you've had your fair share of dealing with uncontrolled flames. Battling thick smoke and toxic fumes, you've broken down obstacles to save trapped people from a fiery grave, and you've studied the nature and source of fire itself to try and better learn how to fight it.

Choose two attribute boosts. One must be to Strength or Constitution, and one is a free attribute boost.

You're trained in the Athletics skill and the Plane of Fire Lore skill. You gain the Breath Control feat.

Pathfinder Rage of ElementsOGL