Zekyl

The zekyl (plural zekylyn; feminine zebeyl, plural zebylyn) or half–shadow dragon drow, were an offshoot of the drow race.

Abilities
A zekyl had the abilities of a drow and that of a half-dragon of shadow dragon patronage. Their drow blood gave them a natural dexterity but unlike normal drow, their dragon blood erased their drow’s physical frailty and made them stronger and their already keen mind sharper and personality stronger.

Them being drow gave them protection against magic that specifically tried to mess with their will, including an immunity against sleep, and also against magic in general. Their dragon side provided them not only an outright immunity against being paralysed but protected them also from physical attacks.

They were the owners of darkvision as well as low-light vision and could cast dancing light, faerie fire and darkness like any other drow, furthermore they owned the ability to breathe life sapping energy against their foes. They didn’t necessarily need weapons because their claws and bite already were usable as one.

As mentioned, a Zekyl was a version of half- shadow dragon drow and had all abilities of a half-dragon and of a drow. They had an immunity against life-sapping effects and a lesser version of the shadow dragon's breath weapon that caused a life-sapping effect. Their distinctive feature was a pair of wings on their back that allowed them to fly faster than they could move on land; normally, only half-dragons of species larger than drow could have wings.

A Zekyl had a predisposition for the roguish arts.

History
Zekyl was the name of the half-dragon offspring of Clan Jaezred's shadow dragons and the drow of Chaulssin, who were enslaved by the dragons. In 634 DR, the dragons were overthrown.

In 734 DR, the now-free citizens of Chaulssin escaped to the Plane of Shadow to evade the armies of Menzoberranzan, who were bent on killing them for being heretics. On the Plane of Shadow, they were part of the founders of Chaul'mur'ssin. They learned of a way to divide their dragon and drow lineages, leading to the creation of the race of the drow-dragon. They returned in a meaningful number to Toril in 1136 DR.

In 1372, the majority of the zekyl lived in Chaulssin and formed the majority of the Jaezred Chaulssin's membership by a large margin.

Half-Deep Dragons
A rarer strain of Zekyl exists that is product of interbreeding between ambitious drow and deep dragons. Also known as drow-dragons, these "half-deeps" possess an unstable mixture of drow and draconic abilities, steadily losing distinct drow abilities as they age and developing random draconic traits in their place. All half-deeps possess clawed fingers and the ability to exhale a cloud of toxic fumes that necrotizes flesh. Depending on the individual, they may be able to detect magic; occasionally invoke a true sight; possess a weak form of regeneration; have superior infravision to a pureblooded drow; be resilient against the effects of heat and cold; have complete immunity against magical effects that charm, put their victim to sleep, or paralyze; or be able to invoke dragon fear.

These drow-dragons also have the predilection for the roguish arts of their more common shadow dragon cousins. They also possess a keen affinity for arcane magic, with far lesser predilections for divine magic or the warrior's arts.

Deep Dragon Zekyl are extremely rare, with only two individuals recorded in drow historical records. Of those, one was slain in its infancy by jealous pureblooded drow rivals, but the other survived and gained considerable power, thanks to its potent racial abilities.