Large aberration, Chaotic Neutral
| Armor Class | 14 |
|---|---|
| Hit Points | 180 (19d10 + 76) |
| Speed | 30 ft. |
| STR | DEX | CON | INT | WIS | CHA |
|---|---|---|---|---|---|
| 18 (+4) | 10 (+0) | 18 (+4) | 21 (+5) | 18 (+4) | 19 (+4) |
| Saving Throws | Con +9, Int +10 |
|---|---|
| Skills | — |
| Damage Vulnerabilities | — |
| Damage Resistances | — |
| Damage Immunities | psychic |
| Condition Immunities | charmed; frightened; poisoned |
| Senses | Truesight 60 ft., passive Perception 14 |
| Languages | Deep Speech; telepathy 120 ft. |
| Challenge | 15 |
The yithian has Advantage on saving throws against spells and other magical effects.
The yithian's thoughts can't be read by any means, and other creatures can communicate with it telepathically only if it allows them.
The yithian makes three Pincer attacks. It can replace one attack with a use of Sup.
Melee Attack Roll: +9, reach 10 ft. Hit: 18 (4d6 + 4) Piercing damage and the creature has the Grappled condition (escape DC 14).
int DC 18, one creature within 10 feet that has the Grappled, Incapacitated, or Restrained condition. Failure: 15 (3d6 + 5) Psychic damage. The target's Hit Points maximum decreases by an amount equal to the damage taken, and the yithian regains Hit Points equal to that amount.
The yithian casts Clairvoyance, Modify Memory, Phantasmal Killer, or Transport via Plants, requiring no spell components and using Intelligence as the spellcasting ability (spell save DC 18).
2/day: Clairvoyance, Modify Memory, Phantasmal Killer