Dusiriel dnd 5e demon for fern flower press fern flower press fernflowerpress.com - Huge fiend with custom stat block for 5E swamp and mist encounters, dnd, monster, creature, beast, 5e, bestiary, by cr, homebrew, tome, guide, lore, stat blocks, tools, modules, legend, folklore.

Dusiriel

Aerial grand duke with a paradoxical dominion over swamps, mist, and liminal waters.
Type: Demon Habitat: Swamps, river mouths, drenched ruins Region: Liminal water-air borders

Lore

Dusiriel holds a lofty office as the eighth Grand Duke under the Wandering Prince Gydriel, within a hierarchy that numbers 100 great dukes and 200 lesser ones, each of the twelve High Dukes commanding another 1,320 personal spirit-servants. He is a demon of the air, yet he shows an anomalous pull toward the element of water.

Outwardly, Dusiriel is always described as a gigantic serpent with the face and head of a spotless human maiden. His body is sheathed in smooth, wet scales of deep emerald or jet-black; the moisture provides both camouflage and hydrodynamics. The face retains a painfully perfect beauty, free of age or flaw, the skin alabaster, the hair long and perpetually damp, hiding the transition to the serpent scales. The eyes have vertical pupils and a faint hypnotic glow that betrays the demon’s non-physical nature. The atmosphere at his arrival carries not stench but the scents of ozone, wet flowers, and marsh fog, along with a noticeable drop in temperature.

Anatomical oddities include an exceptionally powerful and flexible tail edged with razor plates, ethereal wings tipped with icy spikes that materialize in moments of anger, and a concealed second jaw with retractable fangs that spring forward just before a bite.

Despite his airy essence—whose ecology sustains life in the aether—Dusiriel and others like him display a paradoxical attachment to water, favoring swamps, bogs, river mouths, and drenched ruins. The bond is no accident. Marshes and misty shores are liminal spaces where Earth dissolves into Water and Water continually evaporates into Air. For a being whose corporeal shell is condensed from atmospheric vapor, dense swamp fog is the ideal construction material.

Stat block

Dusiriel

Huge fiend (demon), chaotic evil

Armor Class 19 (natural armor)
Initiative +5
Hit Points 375 (30d12 + 180)
Speed 40 ft., climb 40 ft., swim 60 ft., fly 80 ft. (hover)

MOD
SAVE
str
23
+6
+6
int
19
+4
+4
MOD
SAVE
dex
20
+5
+12
wis
18
+4
+11
MOD
SAVE
con
22
+6
+13
cha
21
+5
+12

Saving Throws Dex +12, Con +13, Wis +11, Cha +12
Skills Arcana +11, Deception +12, Insight +11, Perception +11, Persuasion +12, Stealth +12
Damage Resistances acid; cold; lightning; thunder
Damage Immunities necrotic, poison; bludgeoning, piercing, and slashing from nonmagical attacks
Condition Immunities charmed, poisoned, prone
Senses blindsight 30 ft., darkvision 120 ft., passive Perception 21
Languages Abyssal, Auran, Aquan; telepathy 120 ft.
CR 21 (33,000 XP), Proficiency Bonus +7
Find this creature’s full lore and stat block in the book