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Euphoria Cortex - AI-generated fantasy Monster

Euphoria Cortex

Psionic harvesters call this creature a living cathedral of pressure, because its brain is less a brain than a resonant organ the size of a human torso. As it weakens, the cortex floods nearby minds with ecstatic static that feels like relief, clarity, and irresistible confidence all at once. That sensation is the secret of its value. When preserved alive and extracted with proper equipment, the Psionic Cortex can be implanted into other psionic beings to intensify their abilities, though the effect fades rapidly if the euphoric field collapses before extraction is complete.

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LargeAberration(Psionic)CR 23Typically lawful evil

Euphoria Cortex

AberrationPsionicControllerUrban BossHarvestableLegendaryLiving Resource
HP435AC20SPDWalk 20 ft., Fly 40 ft. (hover)CR23InsightPerceptionStealthArcana
STR
18
DEX
16
CON
26
save
INT
28
save
WIS
20
save
CHA
24
save
Magic Resistance. The cortex has advantage on saving throws against spells and other magical effects.
Legendary Actions. The cortex 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.
Aura of Lingering Euphoria. At the start of each of the cortex's turns, each creature of its choice within 30 feet of it must succeed on a Wisdom saving throw or become euphoric until the start of the cortex's next turn. A euphoric creature has disadvantage on opportunity attacks, and the first attack roll it makes before the effect ends is made at disadvantage. If a creature fails this save by 5 or more, it is also charmed by the cortex for the duration. A creature that succeeds is immune to this aura for 24 hours.
Near-Death Resonance. When the cortex is at 217 hit points or fewer, psychic crackles intensify. Its psionic attack damage increases by 7, and creatures that fail its saving throws against its psionic effects also have their speed reduced by 10 feet until the end of their next turn.
False Demise. If the cortex would be reduced to 0 hit points, it can choose to remain at 1 hit point instead. Once it uses this trait, it cannot use it again until it finishes a long rest.
Psionic Lance. Melee or Ranged Spell Attack: to hit, reach 10 ft. or range 120 ft., one target. Hit: 31 () psychic damage, and the target must succeed on a Intelligence saving throw or be stunned until the end of its next turn. If the target is already stunned, it instead takes 18 () force damage.
Cathedral of Thought. The cortex releases a focused burst of destabilizing thought in a 30-foot cone. Each creature in that area must make a Intelligence saving throw, taking 45 () psychic damage on a failed save, or half as much damage on a successful one. On a failed save, a creature also has disadvantage on the next attack roll or saving throw it makes before the end of its next turn.
Telekinetic Crush. Melee Weapon Attack: to hit, reach 10 ft., one target. Hit: 22 () bludgeoning damage plus 27 () psychic damage. If the target is Large or smaller, it must succeed on a Strength saving throw or be pushed up to 15 feet in a straight line and knocked prone.
Pain Makes It Sharper. When hit by an attack, the cortex halves the damage from that attack, and the attacker must succeed on a Intelligence saving throw or take 14 () psychic damage and be unable to take reactions until the start of its next turn. The cortex can use this reaction only if it is at 100 hit points or fewer.
Slip Through Thought. The cortex moves up to half its flying speed without provoking opportunity attacks.
Disorienting Pulse (Costs 2 Actions). One creature the cortex can see within 60 feet must succeed on a Wisdom saving throw or be confused until the end of its next turn. While confused this way, the creature cannot take reactions and must move up to its speed in a random direction if it can.
Overwhelm Mind (Costs 3 Actions). The cortex uses Psionic Lance or Cathedral of Thought.
Cantrips
Innate PsionicsEnchantment and Telekinesis— The cortex can innately cast the following spells, requiring no components: at will, detect thoughts, mage hand, minor illusion; 3/day each, counterspell, dimensional door, telekinesis; 1/day each, dominate monster, feeblemind, psychic scream.
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