Ancient Green Vampiric Shadow Dragon

"The most cunning and treacherous of true dragons, green dragons use misdirection and trickery to get the upper hand against their enemies."

"Shadow dragons were crafty and devious, eclipsing even red dragons in their mental capabilities and were on par with gold dragons, the smartest of the metallic dragons"

"Being highly intelligent and ageless creatures, vampires forged their plans meticulously and advanced the schemes slowly, sometimes taking decades to take steps toward their goals. Vampires felt no need to rush as they could outlive their mortal enemies and spend decades or centuries planning revenge"

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Shadow dragons had dark and translucent scales which helped them camouflage into the darkness around them. Shadow dragons were often mistaken for black dragons dark and indistinct body, but their horns pointed backwards. As for green dragons they were most notable for the large, waving crest or fin that started at the dragon's nose and ran the entire length of the dragon's body. They also had particularly long legs and elongated necks that allowed them to peer over treelines. Their wings often featured dappled patterns and became lighter the further away from the claw. Furthermore, green dragons had no actual ears, rather ear holes on either side of their head, as well as, having exceptionally long, slender forked tongues. As for vampires, for the most part, a vampire retained the appearance they had in life. The main differences were their pale skin tone and sharp, feral features, giving them a predatory aspect. Whatever their eye color was in life, after transformation, vampires' eyes changed to a haunting red color that was hard to forget. Their hands ended in sharp, glassy claws. Notably, vampires possessed retractable sharp monstrous canines used to pierce the victims' flesh. When vampires were well-fed, their undead bodies' decomposition halted and was reversed. A recently-fed vampire had a more pinkish skin color, staving pale complexion and kick-starting the circulatory system temporarily. 

As they aged, shadow dragons learned an increasing number of magical abilities to hide from enemies and enhance their movement. They could hide away into shadows, even those in otherwise well-lit areas, and learned over its ages to cast mirror image, dimension door; nondetection, disguise self  and shadow walk.  Like many other true dragons, they developed sorcerer abilities with at least the potential to learn spells usually only open to divine casters as well as from the chaos, evil and trickery domain

 "<Its said wherever a green dragon dies, a new and deadly plant life flourishes in an area around its corpse. Especially poisonous plants that grow wildly and blossoms that grow to abnormal sizes extraordinarily fast. And those sites were often more connected to the Feywild than the surrounding terrain>, its impossible to fully predict what magics and transformations will take place, if the ritual succeeds and that green dragon thats transformed by Plane of Shadows is converted to Undead."      -  Cultist of the Cult Of The Dragon [~1370 DR]

The forest-loving green dragons sometimes compete for territory with black dragons in marshy woods and with white dragons in subarctic taiga. However, a forest controlled by a green dragon is easy to spot. A perpetual fog hangs in the air in a legendary green dragon’s wood, carrying an acrid whiff of the creature’s poison breath. The moss-covered trees grow close together except where winding pathways trace their way like a maze into the heart of the forest. The light that reaches the forest floor carries an emerald green cast, and every sound seems muffled.

At the center of its forest, a green dragon chooses a cave in a sheer cliff or hillside for its lair, preferring an entrance hidden from prying eyes. Some seek out cave mouths concealed behind waterfalls, or partly submerged caverns that can be accessed through lakes or streams. Others conceal the entrances to their lairs with vegetation.

Lair Actions

On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects; the dragon can’t use the same effect two rounds in a row:

• Grasping roots and vines erupt in a 20-foot radius centered on a point on the ground that the dragon can see within 120 feet of it. That area becomes difficult terrain, and each creature there must succeed on a DC 15 Strength saving throw or be restrained by the roots and vines. A creature can be freed if it or another creature takes an action to make a DC 15 Strength check and succeeds. The roots and vines wilt away when the dragon uses this lair action again or when the dragon dies.
• A wall of tangled brush bristling with thorns springs into existence on a solid surface within 120 feet of the dragon. The wall is up to 60 feet long, 10 feet high, and 5 feet thick, and it blocks line of sight. When the wall appears, each creature in its area must make a DC 15 Dexterity saving throw. A creature that fails the save takes 18 (4d8) piercing damage and is pushed 5 feet out of the wall’s space, appearing on whichever side of the wall it wants. A creature can move through the wall, albeit slowly and painfully. For every 1 foot a creature travels through the wall, it must spend 4 feet of movement. Furthermore, a creature in the wall’s space must make a DC 15 Dexterity saving throw once each round it’s in contact with the wall, taking 18 (4d8) piercing damage on a failed save, or half as much damage on a successful one. Each 10-foot section of wall has AC 5, 15 hit points, vulnerability to fire damage, resistance to bludgeoning and piercing damage, and immunity to psychic damage. The wall sinks back into the ground when the dragon uses this lair action again or when the dragon dies.
• Magical fog billows around one creature the dragon can see within 120 feet of it. The creature must succeed on a DC 15 Wisdom saving throw or be charmed by the dragon until initiative count 20 on the next round.

Regional Effects

The region containing a legendary green dragon’s lair is warped by the dragon’s magic, which creates one or more of the following effects:

• Thickets form labyrinthine passages within 1 mile of the dragon’s lair. The thickets act as 10-foot-high, 10-foot-thick walls that block line of sight. Creatures can move through the thickets, with every 1 foot a creature moves costing it 4 feet of movement. A creature in the thickets must make a DC 15 Dexterity saving throw once each round it’s in contact with the thickets or take 3 (1d6) piercing damage from thorns.
  Each 10-foot-cube of thickets has AC 5, 30 hit points, resistance to bludgeoning and piercing damage, vulnerability to fire damage, and immunity to psychic and thunder damage.
• Within 1 mile of its lair, the dragon leaves no physical evidence of its passage unless it wishes to. Tracking it there is impossible except by magical means. In addition, it ignores movement impediments and damage from plants in this area that are neither magical nor creatures, including the thickets described above. The plants remove themselves from the dragon’s path.
• Rodents and birds within 1 mile of the dragon’s lair serve as the dragon’s eyes and ears. Deer and other large game are strangely absent, hinting at the presence of an unnaturally hungry predator.

If the dragon dies, the rodents and birds lose their supernatural link to it. The thickets remain, but within 1d10 days, they become mundane plants and normal difficult terrain, losing their thorns.

"In the Year of Three Ships Sailing, 1492 DR, an elvish or half-elven vampire lord from Kozakura, Cazador attempted to perform a ritual granted to him by Mephistopheles, transforming himself into a powerful form of a vampire ascendant – removing all undead weaknesses from the vampire and giving him back pleasures of the living. The preparation for the ritual took two centuries. Cazador's favored vampire spawn, the number that included Astarion Ancunín, a member of the Absolute Adversaries, collected countless victims for their master, turning them all into spawn who were to be sacrificed to empower the vampire at the center of the ritual. During the Absolute crisis, the ritual was initiated. However, its outcome nor Cazador's fate were recorded."