“Avowed reaver” is a template that can be applied to any humanoid or monstrous humanoid. The creature is transformed by high magic and raw elemental power. These magical powers fuse body and soul into a single being which becomes native to a particular elemental plane. While the creature is not necessarily compelled to serve the forces that changed them into an avowed reaver, most creatures that can wield such high magic typically require a geas or similar high price for bestowing such a powerful gift.
Challenge Rating: Same as the base creature +2.
Armor Class: increase natural armor by +2.
Hit Dice: Change all of the creature's racial Hit Dice to d10s, recalculate base saves for new type. Class based hit dice and saves are unaffected.
Ability Scores: Constitution +2
Skills: change hit dice based skill points to 6 + Int modifier. Class based skills are unaffected.
Special: Each type of avowed reaver gains abilities unique to their specific elemental subtype.