User:Ecstasy Amphetamine/sandbox8

Description
The Eldwurms are defined by their age and knowledge rather than their physical characteristics since it seems that any species of dragon can be an Eldwurm if they fulfill the requirements of being old and wise. Hence they are a X (social caste? dragon class?) rather than a species of dragon.

Notable Eldwurms
Slyrak

Vyxia

Habitat
Icewrack

Morphology, physiology, and whatnot
Instead of a typical dragon's four limbs (arms and legs) and a pair of wings, wyverns have a pair of wings as their sole forelimbs and a pair of legs, very much like a bird or a bat.

Like most dragons, if not all of them, a wyvern stokes their flame breath in their gullets. This is the same organ where they store their swallowed food, which is gnashed and grinded by the steel or other hard material that they keep in there. In some wyverns who breathe ice instead of fire, their frosty gullets produce a cold breath that sends enemies into a "burning agony"—a paradoxical combination of two incompatible elements. An ice wyvern's frozen gullet also has specialized vesicles that slowly produce ice shards for them to launch towards enemies as a projectile attack.

Personality

 * Like most dragons, wyverns have a tendency to hoard precious items like gold. Because of this, they are often wanted for their money.

In Dota: Dragon's Blood
Although dragons in the animated series are mostly classified by their elemental and fundamental power/identity, some dragon types resemble wyverns. Lirrak and her water dragons, including the rogue Auroth, have a wyvern's features. Uldorak and his earth dragons are vestigial wyverns, because they have shortened (hence, useless) wings on their arms. The air dragons and their sovereign Aethrak are wyverns too.

Heroes
Auroth the is the most notable example of a wyvern.

Characters
Although most of the Crimson Wyvern's appearance is shown on the equipment forged from its remains, it is hard to tell if it is actually a wyvern, since we don't see the rest of its body, especially the wings which is most important in determining if it's a wyvern. Only its name tells us that it was one.

Karaul Silverwing looks like a wyvern, but the locals call it a dragon or an icewyrm,  not to mention that the lore of her stage calls it an icewyrm.

Wyvern Riders
According to the lore of the, there exists a faction of merciless wyvern riders.

Romantic interests
Aghanim loves wyverns very much and has had romantic relationships with them in the past, his first course of action upon meeting them being seduction.