Editing Age Of Dragons: Birthrights and Flaws (section)

===Heat immunity===

The scales and indeed the flesh of dragons cannot be burnt or harmed by heat or flame. This blessing is said to have come about because dragons existed in a time when the newly created world was alight, and the Mother Goddess wove a spell around them to protect them. One result of this birthright is that firebreathing is of no use as an injuring weapon against other dragons.

In game terms, any fire damage dealt to them is ignored, and they never suffer any injury from heat or fire.

Note that this is a magical effect, and as a result ignores physics to a great degree. Its worth bearing in mind:
* Cold still affects and can injure dragons normally.
* Lightning and electricity can still injure dragons.
* Though heat itself doesn't directly injure dragons, dragons can still suffer from dehydration and exhaustion and will still, for example, dehydrate faster in a desert environment.
* A dead dragon has no heat or flame immunity, and can be burnt as normal.
* Smoke inhalation can still harm a dragon.