Of all the dragons, amethyst dragons are among the most orderly and noble. Acting as intermediaries in wars between mortals and dragons alike, these ancient and powerful creatures almost wreath themselves in a haughty air of authority.
Their lavender hide is dazzling and multi-faceted, as if it was made from naturally growing crystals. Wyrmlings have an almost translucent appearance to their gem-like hide, which will gradually become darker and far more dense as the dragon grows. The ridges along their jaws and down their long, sloped spines are the most distinctive features of these dragons, the crest-like growths built like multiple ridges of flat, spiked shrubberies.

Draconic societies Amethyst dragons are almost unique in their desire for social order, and form almost kingdom-like pods of lairs within the plane of earth and their select colonies on the mortal plane. While a few amethyst dragons go off to create separate lairs free from the annoying neighbors next door, the vast majority actually connect their lairs to those of other amethyst dragons in a massive network of sprawling tunnels. The dragons within each pod know their entire network, and many function as guards or soldiers who protect the young and many hoards that exist within. For this reason, it is recommended that no creature attempt to actually raid an amethyst dragon's lair, for you will usually not fight just the one or two dragons that live within.
This desire for society is not made from compassion or need, however, but rather a cold, logical calculation that it is more secure to live together than it is to live alone. This dispassionate way of approaching any major decision extends to all of an amethyst dragon's decisions, from meals to deciding and dividing territory and to the selection of mates. Love, enjoyment and happiness almost never enter the equation.

Energy manipulators Amethyst dragons pride themselves on their ability to manipulate the flow and shape of energy, and no other being can craft the power of raw force like they do. With nothing more than an errant thought the amethyst dragon can form walls of force, charge crystal with destructive kinetic energy and drive away all attacks and foes who would approach them. Additionally, while force is their primary tool and they command the greatest control over it, their latent psionic capabilities allow them to rapidly adapt their body when a different kind of energy harms them, making them more resilient to its harmful effects for a short while. Many an evoker has found naught but frustration when he turned his destructive magics against an amethyst, only to find that the spell had no more effect than a warm summer breeze.

Haughty lords While interacting with lesser mortals, the amethyst dragon will tend to ignore or brush aside any advice that doesn't follow their agenda, preferring to rely on their own egos and ideas. This leads to them being absolutely infuriating when they are not functioning as intermediaries between warring nations, and even in these situations the dragon will often interject their own suggestions for how they would solve the problem, regardless of how feasible the plan might be. This arrogance sometimes blinds them to changes in political climate or situation, and most often once an amethyst dragon has made a decision, it will have done so for life.

Magical aficionados The amethyst dragon is one who loves collecting items of magical import and worth, adding them to their lair and putting them on display for the purpose of bragging. They are very open about what each of their prized items can do, taking pride in memorizing all of the little facts and historical quirks that each particular artifact has. The easiest way to gain an amethyst as a friend and gracious host is to add a new magical item with a long, detailed history to their hoard, regardless of if the item is actually powerful or not.

While most amethyst dragons make their lair on the plane of earth, the ones who live on the mortal plane favor long, winding mountain ranges, where they live within and hollow out the hearts of their earthen homes. These mountains are typically nowhere near a coastline, and some of them are hollowed out volcanoes, leading to occasional conflict with red and brass dragons, and mortal races such as giants and dwarves.

Lair Actions
On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects:

• A wall of force erupts between the dragon and their foes. This wall is 30 feet high, 50 feet long and 1 inch thick, and is completely translucent, allowing creatures to see what is occurring on the other side. A wall may only be created within 120 feet of the dragon. This wall of force lasts for one minute, or until this lair action is used again. A wall of force may be destroyed instantly by a disintegrate spell or similar effect. Alternately, every 10 foot section of the wall has an armor class of 15, 60 hitpoints, immunity to fire, poison, radiant and necrotic damage, and resistance to bludgeoning, slashing and piercing damage from non-magical weapons. The dragon must use two different lair actions before they can use this one again.
• A crystal of pure kinetic energy drops from the lair's ceiling, exploding upon impacting the ground. The dragon targets one space where the crystal lands and erupts, forcing creatures in a 20 foot sphere to make a DC 15 dexterity saving throw, taking 14 (4d6) piercing damage and 14 (4d6) force damage and being knocked 10 feet away from the crystal on a failed save. On a successful saving throw a creature is dealt half as much damage and is not moved.
• The dragon creates a field of humming energy around itself. Until the next lair action, creatures within 25 feet of the dragon must make a DC 15 strength saving throw to move closer to the dragon and they make ranged attacks against the dragon at disadvantage.

Regional Effects
A legendary amethyst dragon's lair is warped by the dragon's magic, which creates one or more of the following effects:

• Within 1 mile of the amethyst dragon's lair, stone and gems will form into sentient constructs such as gargoyles and stone or clay golems. These constructs are friendly to the dragon and obey its commands, and are indifferent to creatures who have no harmful intent for their draconic master. Typically there are 3d8 gargoyles and 2d4 golems scattered throughout the tunnels of the dragon's lair.
• The walls of the dragon's tunnel system and cave entrances within 5 miles of the dragon's lair will have a purple sheen to them, becoming lightly encrusted in a gem-like lair that gleams in the light. This dazzling rock is highly reflective, and hums lightly at all times, giving off faint vibrations when a creature touches it.
• If the dragon settles within a natural cavern, the landscape of the tunnels and caves will slowly change, taking on the crude form of an underground castle complete with amethyst gates, walls and rooms for guests. This includes statues of itself that are almost life-sized replicas of the dragon's glory in perfect amethyst, standing vigil and serving as decorations. The dragon knows the location of all creatures within the line of sight of these statues. Each statue has Truesight out to 60 feet and a natural perception of 16.

If the dragon dies, the gems and constructs will crumble into dust within 1d10 weeks. Stones shaped into fortifications will remain for as long as they do not erode or are not broken.