Adult Veylthar Dragon
Adult Veylthar Dragon CR: 17
STR
23 +6
DEX
16 +3
CON
24 +7
INT
19 +4
WIS
18 +4
CHA
21 +5
Innate Spellcasting.
Charisma is the spellcasting ability (save DC 18).At will: darkness, mirror image
3/day each: greater invisibility, dimension door (only in dim light)
1/day each: mislead, synaptic static
Evolving Umbral Presence. In dim light or darkness, the dragon is invisible unless it chooses otherwise. When it first becomes visible, creatures of its choice within 30 ft. must succeed on a DC 18 Wisdom saving throw or be Frightened until the end of their next turn.
Half-Form Reflection (Recharge 5–6). As a bonus action, the dragon splits its reflection from itself, creating a translucent duplicate in an unoccupied space within 30 ft. The duplicate lasts 1 minute, shares the dragon’s initiative, has AC 18 and 40 HP, and can take the Hide or Dodge action. While it exists, attacks against the dragon have disadvantage unless they come from a source of bright light.
Shadowglass Body. When struck by a critical hit, shards erupt from the dragon’s scales. The attacker must succeed on a DC 18 Dexterity saving throw or take 14 (4d6) necrotic damage and be Blinded until the end of their next turn.
Shadowed Humanoid Form (2/Day) The Adult Veylthar Dragon can assume the form of a Medium humanoid composed of unstable shadowglass, functioning like a limited version of polymorph tailored to humanoid shapes, but with the following changes:
The dragon retains its Intelligence, Wisdom, Charisma, saving throw proficiencies, and innate spellcasting.
It loses access to its breath weapon, flight, and natural attacks.
It uses the humanoid form’s Strength, Dexterity, and Constitution scores (typically moderate, determined by DM).
While in this form, the dragon’s body flickers and occasionally desynchronizes by a fraction of a second. Attacks made against its humanoid form have a 10% chance to pass through harmlessly, as if striking a warped reflection.
If the humanoid form is reduced to 0 HP, it immediately shatters into sharp shadowglass fragments and reforms into its true draconic shape, dealing:
10 (3d6) necrotic damage in a 10-ft radius (DC 17 Dex save for half).
When reverting voluntarily, the transformation looks like a reflection being “peeled” off a mirror and swelling into the dragon’s true form.
This ability represents the imperfect, adolescent state of its species’ ability to manipulate form and reflection.
Actions
Multiattack. The dragon makes three attacks: one bite and two claws, or one bite, one claw, and 1 tail attack.
Bite. +11 to hit, reach 10 ft.; 20 (2d10 + 9) piercing + 9 (2d8) necrotic.
Claw. +11 to hit, reach 5 ft.; 16 (2d8 + 7) slashing + 4 (1d8) cold.
Tail. +11 to hit, reach 15 ft.; 17 (2d10 + 6) bludgeoning + 4 (1d8) psychic.
Breath Weapon (Recharge 5–6): Veilfire Torrent.The dragon expels a cone (60 ft.) of shimmering black flame and glass dust. Each creature in that area must make a DC 18 Dexterity saving throw, taking 63 (14d8) necrotic damage on a failed save or half as much on a success.
Secondary Effect: On a failed save, the creature’s shadow is partially torn free, reducing its movement speed by 10 ft. and granting the dragon advantage on attack rolls against it until the end of the dragon’s next turn.
Bonus Actions
Shadow Step. While in dim light or darkness, the dragon teleports up to 40 ft. to a space it can see. The first attack it makes before the end of its turn after teleporting deals an extra 9 (2d8) necrotic damage.
Veil Mend (1/Turn). If the dragon begins its turn in dim light or darkness, it can use a bonus action to regain 20 hit points.
Reactions
Umbral Counterstep. When a creature ends its movement within 10 ft. of the dragon, it can teleport up to 20 ft. to an unoccupied space in dim light or darkness without provoking opportunity attacks.
Mirror Reversal (1/Day). When a ranged attack or spell targets the dragon, it reflects the energy back at its origin. The attacker must succeed on a DC 18 Dexterity saving throw or take the attack’s damage themselves.
Usual Tactics
The Adult Veylthar Dragon is a master of psychological combat, testing its foes rather than destroying them outright. It uses darkness and mirror image to mask its position, then deploys Half-Form Reflection to confuse opponents into attacking illusions. It targets spellcasters and archers first, using Veilfire Torrent to weaken them and Shadow Step to pounce on stragglers. If badly hurt, it retreats into the dark and heals with Veil Mend, waiting to strike again from a different angle.
Draconic Description
The Adult Veylthar Dragon moves like a living shadow given purpose — a creature not fully formed from matter, but from reflection and absence. Its scales are deep obsidian-black, yet ripple with an oil-sheen iridescence that shifts from violet to green to deep cobalt when touched by dim light. Each movement trails faint spectral echoes — silhouettes that lag behind for a heartbeat before catching up, as if reality itself struggles to remember where the dragon truly is.Unlike its Ancient kin, its body has not yet fully merged with the mirror realms it commands. Small fractures lace its scales, glowing faintly from within like veins of molten dusk. The light within those fissures pulses in rhythm with its heartbeat, creating a hypnotic cadence that unsettles those who gaze too long.
Its wings are broad and nearly translucent at the edges, like panes of thin shadowglass webbed with threads of black flame. When unfurled, they scatter reflections across the surfaces around it — ceilings, walls, armor — each reflection subtly out of sync with the real motion. Its tail ends in a wicked blade-like ridge of crystalline glass that hums faintly when it moves, producing an almost melodic resonance that dies quickly in the air.
Its eyes are not orbs but mirrored voids: smooth planes of reflective darkness that show observers not their own faces, but distorted versions — their tiredness, fear, or deceit staring back at them. When angered, those mirrors flare with deep violet light, fracturing into spiderweb cracks that spill shadow like blood.
The air near the dragon is colder than it should be, the kind of chill that comes from absence rather than ice. Footsteps and speech sound muted, as though the world itself holds its breath in its presence. Dust and light both fall slower within a few feet of its form, suspended by its silent gravitational pull — the stillness of a creature learning to command darkness not as a veil, but as an extension of its will.
Humaniod Form Description
Humanoid Appearance: “The Fractured Shade” The adult’s humanoid form is not polished or symmetrical like the Ancient’s Mirror Sovereign. Instead, it is eerie, incomplete, and uncanny — a shape struggling to hold itself together.Physical Description
Its skin resembles smoky, translucent obsidian, shot through with hairline cracks that glow faint violet whenever it moves.
Tiny shards of shadowglass constantly drift off its body and dissolve into mist before touching the ground.
Its limbs appear slightly too long or too thin, with joints that bend at subtly incorrect angles if watched carefully.
Its eyes are dark mirrors — not reflecting faces accurately but instead showing an emotionally heightened version of whoever looks at them (fear, shame, longing, guilt).
The mouth shifts a moment after words are spoken, creating a slight dissonance between voice and appearance, like a poorly aligned reflection.
Hair manifests as shifting strands of shadow that move in slow underwater motions no matter the environment.
Much like its dragon form, the humanoid form casts multiple shadows, each delayed or advanced, creating a sense that it is walking slightly out of sync with time.
Evolution to Ancient
At this stage, the Veylthar Dragon’s control of shadow is biological rather than supernatural — its scales refract light inconsistently, and its mirrored duplicates are unstable. As it matures:- Half-Form Reflection evolves into the Ancient’s Living Reflection, allowing it to animate true shades of its enemies.
- Its breath weapon gains the capacity to burn away entire souls, creating fully independent Shadowspawn instead of minor slowing effects.
- Its lair begins forming mirrored pockets of dimensional space, the first echoes of the “mirror world” that surrounds the Ancient.
- Emotionally, the adult moves from predation to curation — beginning to collect secrets and reflections instead of merely devouring those who see it.

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