Huge monstrosity, chaotic evil

Armor Class: 18

Hit Points: 315 (30d12 + 120) 30d12+120

Speed: 40 ft

STR

25 +7

DEX

12 +1

CON

18 +4

INT

5 -3

WIS

14 +2

CHA

10 +0

Saving Throws: STR +13, CON +10, WIS +8

Skills: Perception +8

Damage Resistances: Bludgeoning, Piercing, Slashing (from nonmagical attacks)

Damage Immunities: Fire, Cold, Lightning, Acid, Poison

Condition Immunities: Charmed, Frightened, Poisoned

Senses: Darkvision 120 ft., Passive Perception 18

Challenge Rating: 18 ( 20,000 XP)

Proficiency Bonus: +6

Actions

Multiattack. The Quintauran makes five bite attacks, one with each head.   Bite. (Fire, Cold, Lightning, Acid, or Poison Head). Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 18 (2d10 + 7) piercing damage plus elemental damage based on the head:

• Fire: 7 (2d6) fire damage
• Cold: 7 (2d6) cold damage
• Lightning: 7 (2d6) lightning damage
• Acid: 7 (2d6) acid damage
• Poison: 7 (2d6) poison damage

• Fire (30-foot cone): Each creature in that area must make a DC 18 Dexterity saving throw, taking 55 (10d10) fire damage on a failed save, or half as much on a successful one.
• Cold (60-foot line, 5 ft. wide): Each creature in that area must make a DC 18 Constitution saving throw, taking 45 (10d8) cold damage on a failed save, or half as much on a successful one.
• Lightning (60-foot line, 5 ft. wide): Each creature in that area must make a DC 18 Dexterity saving throw, taking 50 (10d10) lightning damage on a failed save, or half as much on a successful one.
• Acid (30-foot cone): Each creature in that area must make a DC 18 Dexterity saving throw, taking 49 (11d8) acid damage on a failed save, or half as much on a successful one.
• Poison (30-foot cone): Each creature in that area must make a DC 18 Constitution saving throw, taking 42 (12d6) poison damage on a failed save, or half as much on a successful one.

Legendary Actions

The Quintauran can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time, and only at the end of another creature’s turn. The Quintauran regains spent legendary actions at the start of its turn.

1. Tail Swipe. The Quintauran swings its tail, forcing each creature within 15 feet to make a DC 18 Dexterity saving throw or take 19 (3d10 + 7) bludgeoning damage.
2. Bite (Costs 2 Actions). The Quintauran makes a bite attack with any head.
3. Elemental Eruption (Costs 3 Actions). The Quintauran channels its elemental powers, causing an eruption of energy. Each creature within 20 feet of the Quintauran must make a DC 18 Constitution saving throw or take 14 (4d6) damage of a randomly selected elemental type (fire, cold, lightning, acid, or poison).

Usual Tactics

Behavior and Tactics: The Quintauran is an apex predator, typically dwelling in ancient, secluded jungles or elemental-infused regions. Highly territorial, it considers other powerful creatures and large humanoid groups as threats, attacking anything it perceives as an intruder. Quintaurans are surprisingly intelligent for a dinosaur-like creature, understanding basic tactics to control the battlefield by spreading out its attacks and utilizing its heads for maximum effect. Each head has its own temperament:

• Fire is the most aggressive, often initiating combat.
• Cold is the most calculating, taking measured strikes.
• Lightning is the most erratic, favoring quick, brutal attacks.
• Acid is more defensive, using its corrosive abilities on close attackers.
• Poison is cautious and cunning, preferring to attack from a distance.

Suggested Environments

The Quintauran's environment is an ancient, primal jungle with a wild and untamed aura, dense with towering trees whose thick, twisted roots snake across the ground, and lush ferns and foliage spilling out in every direction. The forest canopy is so thick that only beams of filtered light pierce through, casting eerie shadows and dappled patches of sunlight on the forest floor. The air is heavy and humid, filled with the scent of moss, damp earth, and faint traces of sulfur and rot from long-forgotten decay. Creeping vines laden with exotic, oversized flowers wrap around tree trunks, some with iridescent petals that seem to glow faintly in the dim light, suggesting hidden magical properties. Insects buzz and skitter about, while strange bird calls echo through the trees, occasionally interrupted by ominous roars from unseen creatures deep in the underbrush.   Pools of murky water are scattered throughout the jungle floor, surrounded by moss-covered rocks and inhabited by tiny, bioluminescent fish that glow in hues matching each element—red for fire, blue for cold, yellow for lightning, green for acid, and purple for poison—almost as if nature itself reflects the Quintauran's power. Strange, phosphorescent fungi line fallen logs and rocks, adding an otherworldly glow that illuminates the darkness.   The jungle has an undeniable feeling of elemental energy, as if it is naturally infused with primal forces. Sections of scorched ground, frozen patches, lightning-scarred trees, and acid-pitted stones dot the landscape, hinting at the Quintauran's presence. Its lair is hidden deep within a series of twisting caves nestled among ancient stone cliffs, each chamber marked by the presence of its elemental powers. Fire-burned rocks, frost-rimed walls, acid-scarred pools, crackling electric charges, and lingering poisonous mist make approaching its lair a deadly venture for the unprepared.