Dragons

The Dragons have been the greatest threat, rivals, and allies to the protagonist at various stages of the story, they have a strong presence within the Great Elroe Labyrinth and were once one of the sacred beasts of the world. There are four main varieties of dragon shown, each is based on the four primary elements Wind, Water, Fire, and Earth. It has been implied that the respective power of the species may follow a similar order. Other varieties include Ice and Light dragons.

Of the four varieties, the Earth Dragons have had the greatest impact with a strong presence in the bottom strata of the Great Elroe labyrinth, in which the protagonist was trapped at one stage. While the Fire dragons have had its evolution tree explained due to the entirety of its family existing in the middle stratum of the labyrinth and the fact that the protagonist's 「Appraisal」skill was also at the level where it shows greater details. From this time it was shown that the specific Wyrm and Dragon skills have a great connection in Dragon evolution as each evolution has shown a higher level in these skills implying either taking a role in evolution or growing from it.

All dragons are born as Wyrms, and only become full dragons after evolving several times.

Unlike all other monsters, each individual dragon is considered to be their own subspecies by the system: System : appraisal shows Earth dragon kagna as a species name, not as a given name. Fei's given name became her species name upon evolution, and her Monster Encyclopedia shows that her species has the reincarnator-specific N%I=W skill, so she it seems likely that she is first and last individual of the Light Dragon Feirune species.

Dragon Family Skills
「{Element} Wyrm：LV10」►「{Element} Dragon：LV10」► 「???」

「 Dragon scales：LV10」► 「Imperial Scales： LV10」►「Divine Scales : LV10」

All Wyrms that have been appraised as of LN4 have had an elemental Wyrm skill such as [Fire Wyrm], and all dragons have had an elemental Dragon skill such as [Fire Dragon]. In the Fire Wyrm evolutionary line, the [Dragon scales] skill is acquired upon the evolution to catfish, and is upgraded to [Imperial Scales] upon evolution to fire drakes. The highest level dragon, Araba, has [Earth Dragon LV3] and [Divine Scales LV 2].

Dragons and Wyrms do not have the [Dragon Power] or [Wyrm Power] skills awarded by the [Dragon Slayer] and [Wyrm Slayer] titles.

Known evolutions from the LN (needs editing)
High level dragon (perhaps [XXX Dragon] skill LV10 is requirement?) -> Naga

Earth Wyrms
Elroe Kolift (Feirune): earth dragon offspring, dies after around 10 years, chameleon-sized, black, wingless -> [Unknown species]: three feet long, ~700 in each stat. + familiar of a hero -> Light Dragon Feirune: [Light Wyrm] LV9, [Light Magic] LV1, [Flight] LV1 (doesn't have the [Light Dragon] skill, and yet has a dragon-style species name..? has [Earth Wyrm] LV9)

'an earth wyrm, a rank below this thing' -> Earth Dragon Ekisa

Fire Wyrms
Seahorse -> Catfish -> Eel -> Drake -> Dragon

Trivia
Wyrms and Dragons count separately towards hunting titles.