His Evility Anti Elements, which decreases the elemental resistances (except for star magic) of adjacent enemy unit by 30%.
The Dragon King is a Monster designed completely around Physical attacks. With amazingly high HP and ATK Aptitudes, they are at their best in the front-lines. Their own flaw is their very low MV. This can make it difficult for them to corner higher-MV enemies without assistance. Given their specialties, they have little to no Magic ability, and are in fact vunerable to Wind Magic.
Given their ability to weaken the Elements of those around them, their fighting style synergizes the best alongside certain classes. Magichanging with Warriors allows an increase in stats as well as lower enemy defense. Fighting on their own along with a Magic Knight allows her to take advantage of enemies' weakened Element Resistances to pile on the damage.
“A fiery demon that can even destroy miracles.”
—Short in-game description
“The greatest demons, who are born from flames, They are the strongest of all dragons, and are as strong as Overlords. Ordinary weapons can't hurt them, and the hellfire that flows from their bodies can burn anything in an instant. Legends say they've reduced Netherworlds to ash.”