Shimmerhorn drakes are characterized by their powerful four-legged anatomy and lack of wings. Their skin is not bioluminescent, yet it showcases a remarkable feature of crystal formations that adorn its body. When exposed to ultra-violet light, these crystals exhibit a faint glow, giving the species its name of
Shimmerhorn.

A Shimmerhorn's head, with purple crystals — AI concept by Nulcheck (via Midjourney)
The most captivating aspect of shimmerhorns are the crystals that adorn various parts of their body. Unlike traditional horns found on other dragonkin, shimmerhorns possess horns that are enveloped in a layer of crystal rather than the typical keratin. This semi-transparent covering allows for a partial view of the underlying bone structure of the horn.
In addition to their striking horns, these drakes also feature a large, club-like crystalline formation at the tip of their tail. This heavy mass serves as a formidable defensive weapon, allowing the drake to fend off potential threats. The crystalline structure may also have various protrusions, such as nubs or spikes, which enhance its effectiveness in combat. However, these features can become worn down over time due to frequent use in battles, altering the appearance and effectiveness of the tail end. Furthermore, a smooth crystalline cap crowns their snouts, often featuring a slight protrusion as well, and similarly can be worn down from extensive use.
The osteoderms at specific areas on the drake exhibit a unique substance that appears to facilitate the deposition of minerals. As these specialized scutes remain immersed in the hot springs' mineral-rich waters, they attract and accumulate various minerals and form crystals.
In contrast, the skin and other scales of shimmerhorns are covered in an almost waxy secretion. This protective layer acts as a barrier, effectively preventing the formation of crystals on their surface. The waxy substance also serves to shield the skin from potential harm caused by rapid mineralization, allowing the organism to remain flexible and preventing crystallization of its entire body.
Vocalization
When shimmerhorns are born, their first drink of the mineral-rich waters will start to form crystals in their throat. Once fromed, they are pressed together and use as vocal cords. The crystals rubbing against each other produce a distinct squeaking sound, similar to squeezing a handful of marbles.
[6] As shimmerhorns mature into adulthood, they possess larger crystal formations in their throats, resulting in a much lower, louder, and richer sound that resonates within them. Despite the increase in volume, and lower pitch, they retain that signature squeaky quality that can be heard echoing across their territory.
The Vocalization might be my favorite part! Well done!
Haly, the Moonlight Bard
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