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The Thornwing Mournling, Vaelith the Briar Drake - AI-generated fantasy Monster

The Thornwing Mournling, Vaelith the Briar Drake

Ysara encountered the Thornwing Mournling during her early field research, when it was a wounded juvenile trapped in an abandoned royal warding circle. She secretly nursed it back to health and taught it several human words, but concealed the relationship after discovering that the crown intended to study and weaponize the Star-Seal. The Mournling still remembers Ysara as its protector. It now hunts the royal patrols pursuing it, while also being hunted by the second monster. The third monster treats it as prey, and repeated escapes from that predator have caused the Mournling's body and dreams to mutate under the breach's influence.

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LargeFey(Fey dragon)CR HighChaotic neutral

The Thornwing Mournling, Vaelith the Briar Drake

feydragonambusherillusionistguardianblighted woodsStar-SealYsara connectionpotential allyrecurring antagonist
HP136AC+8SPD40 ft., Fly 80 ft., Climb 30 ft.CR8 (3,900 XP)DeceptionInsightPerceptionStealthSurvival
STR
18
DEX
16
save
CON
16
INT
13
WIS
15
save
CHA
18
save
Briar Ambusher. The Thornwing Mournling has advantage on Dexterity (Stealth) checks made in forests, ruins overgrown with vegetation, or areas of dim light. If it surprises a creature, its first attack against that creature deals an additional 7 () psychic damage.
Thornstride. The Mournling can move through nonmagical plants without being slowed by them and without taking damage from them. Magical plants still affect it normally.
Many Borrowed Voices. The Mournling can mimic any voice it has heard. A creature that hears the imitation can identify it as false with a successful Wisdom (Insight) check.
Fey Resilience. The Mournling has advantage on saving throws against being charmed, and magic cannot put it to sleep.
Breach-Tethered Survival. If the Mournling is reduced to 0 hit points while within 1 mile of the Star-Seal, it instead dissolves into thorn shadows, reappearing with 20 hit points in its lair after days. This trait does not function if the Mournling has been affected by Resonant Disruption within the previous minute.
Riddle of the Rootbound Heart. When a creature within 60 feet speaks a personal secret aloud, the Mournling can form a dream-image revealing a symbolic truth about that secret. This is not mind reading and provides no exact factual details.
Keeper of the Hidden Route. The Mournling knows the hidden route from its lair to the Star-Seal chamber. It can guide up to ten willing creatures through the route in 1 hour, avoiding ordinary patrols and natural hazards.
Multiattack. The Thornwing Mournling makes one Bite attack and one Thorn Talon attack, or it uses Briar Veil and then moves up to half its flying speed without provoking opportunity attacks.
Bite. Melee Weapon Attack: to hit, reach 10 ft., one target. Hit: 11 () piercing damage plus 7 () psychic damage. If the target is frightened, it takes an additional 4 () psychic damage.
Thorn Talon. Melee Weapon Attack: to hit, reach 5 ft., one target. Hit: 9 () slashing damage plus 4 () poison damage. The target must succeed on a Strength saving throw or be restrained by spectral briars until the end of its next turn.
Briarstorm Breath (Recharge 5-6). The Thornwing Mournling exhales a spiral of black thorns in a 30-foot cone. Each creature in that area must make a Dexterity saving throw, taking 27 () piercing damage on a failed save, or half as much damage on a successful one. On a failed save, a creature is also blinded by illusionary leaves until the end of its next turn.
Briar Veil. The Thornwing Mournling creates a 20-foot-radius sphere of whispering briars centered on a point it can see within 90 feet. The area becomes heavily obscured to creatures of its choice until the end of the Mournling's next turn. Creatures entering the area for the first time on a turn or starting their turn there must succeed on a Wisdom saving throw or become frightened until the end of their next turn.
Stolen Voice. The Thornwing Mournling targets one creature it can see within 60 feet. The target must succeed on a Wisdom saving throw or hear the voice of a trusted ally issuing a contradictory command. Until the end of the target's next turn, it cannot take reactions and must subtract from its next attack roll or saving throw. A creature that succeeds is immune to this effect for 24 hours.
Dreamstep (Recharge 4-6). The Thornwing Mournling chooses up to three creatures it can see within 60 feet. Each target must succeed on a Charisma saving throw or be teleported to an unoccupied space within 20 feet of the Mournling and become confused by overlapping dream-images until the end of its next turn. The Mournling can then fly up to half its flying speed.
Briar Slip. When the Thornwing Mournling is hit by an attack while within 30 feet of heavy foliage, it reduces the damage by 10 () and moves up to 15 feet without provoking opportunity attacks. It cannot use this reaction while affected by Resonant Disruption.
Winged Reposition. The Thornwing Mournling moves up to half its flying speed without provoking opportunity attacks.
Whispered Doubt. One creature within 60 feet must succeed on a Wisdom saving throw or have disadvantage on the next attack roll it makes before the end of its next turn.
Thornwake (Costs 2 Actions). The Mournling targets a point within 60 feet. Thorny ground erupts in a 10-foot-radius area until the start of its next turn. The area is difficult terrain, and each creature that enters it for the first time on a turn takes 5 () piercing damage.
Echo of Another (Costs 3 Actions). The Mournling uses Dreamstep if available. Otherwise, it uses Stolen Voice without expending that action's normal recharge limitation.
Cantrips
Minor IllusionIllusion— The Mournling creates a sound or image of a familiar creature or object within range. It often uses this to imitate a patrol command, a child's cry, or Ysara's voice.
2nd level
InvisibilityIllusion— The Mournling becomes invisible until it attacks, casts a spell, or ends concentration. Its concentration can last up to 1 hour.
DarknessEvocation— The Mournling creates a 20-foot-radius sphere of magical darkness that it can see through.
Charm PersonEnchantment— The Mournling charms a creature for up to 1 minute if it fails a Wisdom saving throw. The effect ends if the Mournling or its allies harm the target.
Misty StepConjuration— The Mournling steps into shadow and reappears in an unoccupied space within 60 feet that it can see.
3rd level
EntangleConjuration— The Mournling creates a wall of tangled, thorn-covered vegetation in a 20-foot square. The wall provides cover and makes the area difficult terrain.
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