Medium aberration, Neutral
| Armor Class | 12 |
|---|---|
| Hit Points | 76 (17d8) |
| Speed | 30 ft. |
| STR | DEX | CON | INT | WIS | CHA |
|---|---|---|---|---|---|
| 9 (-1) | 14 (+2) | 10 (+0) | 15 (+2) | 11 (+0) | 14 (+2) |
| Saving Throws | — |
|---|---|
| Skills | — |
| Damage Vulnerabilities | — |
| Damage Resistances | bludgeoning; piercing; slashing |
| Damage Immunities | — |
| Condition Immunities | charmed; frightened; grappled; paralyzed; petrified; prone; restrained; stunned |
| Senses | darkvision 30 ft., passive Perception 10 |
| Languages | telepathy 30 ft. |
| Challenge | 5 |
The swarm can use its sending spell to target someone familiar to a creature in telepathic contact with the swarm.
The swarm can occupy another creature's space and vice versa, and the swarm can move through any opening large enough for a Tiny rat. The swarm can't regain hit points or gain temporary hit points.
The swarm is immune to any effect that would sense its emotions or read its thoughts, as well as to divination spells.
Melee Attack Roll: +5 to hit, reach 0 ft., one target in the swarm's space. Hit: 14 (4d6) piercing damage, or 7 (2d6) piercing damage if the swarm has half of its hit points or fewer, plus 22 (5d8) psychic damage.
The swarm casts one of the following spells, requiring no spell components and using Intelligence as the spellcasting ability (spell save DC 13):
At will: command *, detect thoughts *, sending *
1 each/day: confusion *, dominate monster *