User blog comment:Kogath/Monster Hunter X Discussion/@comment-6050823-20150814005619

Things You May Not Know About the Dragon Element(Info comes from the Hunter's Encyclopedia 2, 3, and 4)

Monsters
 * The Dragon Element is a mysterious, unknown element manipulated by all Elder Dragons and used by some powerful Wyverns.
 * Confirmed Elder Dragon-Level Monsters: All Rare Species(Silver Rathalos, Gold Rathian, Lucent Nargacuga, etc.), Rajang, Deviljho, the Espinas Species, Shen Gaoren, All Three Wyvern Gods(Akantor, Ukanlos, Odibatorsu), Gore Magala, UNKNOWN(Black Flying Wyvern), Raviente, Berukyurosu/Doragyurosu, and Apex Monsters.
 * The Dragon Element is primarily used by Elder Dragons with just their physical attacks. This Dragon Element affects the amount of damage an enemy takes depending on their resistance to the element. This also applies to Elder Dragons since certain parts of an Elder Dragon can't be cut without the element.
 * Noticeably, most Wyverns and most Elder Dragons are weak to the element while most other monsters from other classes are not bothered by it. There are some exceptions here and there but not very many.
 * Oddly, Dragonfell Berries and even some ore have similar properties to the Dragon Element that most Wyverns and Elder Dragons dislike. The berries can be eaten to gain a boost in resistance and power can even be gained from them.
 * That's how the Dracophage Bugs gain power from the berries and Stygian Zinogre uses them to boost its own Dragon Element.

Hunters
 * The Dragon Element on weapons is a power that directly attacks the mind and consciousness of the monster. The more intelligent and sentient the monster, the more damage the element does to the monster.
 * Many horrid things have been said to happen to hunters that use the element such as becoming an enemy to the world.
 * Nothing really good is attached to this element generally so it really is only called a Dark or Demonic Element.
 * It has been found that there are other ways to get a chemical reaction from the Dragon Element without weapons. With special technology the Dragon Element can be used for the Demolisher and Bowgun Ammo.
 * The skill, Peak Peformance, seems to have a connection to the element and even Elder Dragons.

Minor Note:
 * The idea of the element seems to have come from this.