Medium Swarm of Tiny Beasts, Unaligned
AC11
Initiative+1 (11)
HP19 (3d8 + 6)
SpeedText 20 ft., Climb or Fly 20 ft. (DM's choice), Modes [object Object]
STR3
MOD-4
SAVE-4
DEX13
MOD+1
SAVE+1
CON14
MOD+2
SAVE+2
INT1
MOD-5
SAVE-5
WIS7
MOD-2
SAVE-2
CHA1
MOD-5
SAVE-5
Damage ResistancesBludgeoning; Piercing; Slashing
Condition ImmunitiesCharmed; Frightened; Grappled; Paralyzed; Petrified; Prone; Restrained; Stunned
SensesText Blindsight 30 ft.; Passive Perception 8; Entries Blindsight 30 ft.; Passive Perception 8
LanguagesNone
CRCR 1/2 (XP 100; PB +2)
Traits
Spider Climb. If the swarm has a Climb Speed, the swarm can climb difficult surfaces, including along ceilings, without needing to make an ability check.
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 insect. The swarm can’t regain Hit Points or gain Temporary Hit Points.
Actions
Bites. Melee Attack Roll: +3, reach 5 ft. Hit: 6 (2d4 + 1) Poison damage, or 3 (1d4 + 1) Poison damage if the swarm is Bloodied.
Found on p.370 of MM2025 (Free Rules)