I have the natural spell feat already. I was curious if there were any rules about layering transmutation spells and the wording of said spells interacting with a druid's wild shape ability.
Spell in question, with the bit that caught my attention:
Fire Wings (Spell Compendium, p. 93) (Transmutation [Fire]): In a flash of light and a roar of fire, your arms become wings of flame ... If you are not flying, you can make up to two attacks each round with the fire wings as if they were natural weapons. A successful attack deals 2d6 points of fire damage.
Because replacing the 2 claws of a wild shape with 2d6 fire damage phoenix wings would be a cool spell interaction. I'm just not sure if there's a solid rule on layering transmutation spells or if the spell's specific wording of "arms" would throw the issue.