Dragon Slayers are a unique type of people who utilize a form of Lost Magic, Dragon Slayer Magic. Each Dragon Slayer has their own form of Magic, just like each Dragon is a master of their own element. In addition, the said Dragon Slayer also has the ability to eat their own element. Doing so rejuvenates them and enhances their abilities. Dragon Slayers are known to possess keener senses than that of normal humans such as in smell, sight and hearing.
There are three generations of Dragon Slayers. There is the First Generation, who learn their abilities from Dragons, the Second Generation, who have Lacrima crystals implanted into themselves, and the Third Generation which is merely a combination of both previous ones.
It seems that, for some reason, all Dragon Slayers of an advanced "level" share a weakness in motion sickness. At lower "levels" this isn't such a problem as shown with Gajeel prior before two years ago later, having rode on both the Super Mage Giant Phantom MK II and the ship to Tenrou Island with ease. However, after two years of intense training, he became vulnerable to motion-sickness.
Dragon Slayer Magic has limitless functions in Edolas, and is valued as a priceless resource for everyday uses.
The original Dragon Slayers of the First Generation are taught their abilities by an actual Dragon. In most cases, the particular Dragon Slayer’s teacher was also their foster parent.
Those from this generation of Dragon Slayers are ones who have had Dragon Lacrima implanted into their bodies, granting them Dragon Slayer Magic. Due to the fact that they are not taught their abilities by a Dragon, they are considered artificial Dragon Slayers. Unlike the First Generation types, they are capable of activating Dragon Force more easily on their own free will.
Dragon Slayers of this type are both taught their Magic by a Dragon and have bodies implanted with Dragon Lacrima. As with the previous generation, it appears that they can activate Dragon Force more freely.
- Dragneel Natsu - Fire Dragon Slayer Magic, Taught by Igneel, First Generation; Lightning Flame Dragon Mode (transferred by Dreyar Laxus), Generation unknown.