I was thinking of a bard build and dragonfire inspiration, and was wondering what rules if any prevent you from taking draconic heritage multiple times?
Normally it wouldn't matter for either of these two reasons
A) A feat does X when you take it, and getting X again doesn't benefit you anymore. For example who needs two power attacks
B) A feat provides a bonus (such as ability focus), and unless the feat says it stacks with itself while you can take it again you can only benefit from the same source 1 for it is a typed bonus listed as "feat X"
But what is stopping from a human sorcerer with flaws at level 1 taking Draconic heritage
Battle (Sonic, NG),
Copper (Acid, CG),
Bronze (Electricity, LG),
Silver (Cold, LG),
and at level 3 taking Draconic Heritage for the 5th time and taking
Brass (Fire, CG)
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Now each Dragonfire Inpsiration is its own elemental effect, the effect are different thus they stack. So gain the ability to sing more than two songs at once (several prestige classes or the two feats in the Dragon Magazines) and you can do two songs per standard action.
Polymorph into a Choker with the Assume Supernatural Ability Feat or Metamorphic Transfer and you have two standard actions per round.
Use a belt of battle to make a swift action into a standard actions and now you have six standard actions per round.
Allowing you to cast all 5 elemental versions of Dragonfire Inspiration as well as the standard form.
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So any rules stopping this?