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Medium swarm of Tiny beasts · CR 1/2

Swarm of Beetles

Armor Class12
Hit Points22 (5d8)
Speed20 ft., burrow 5 ft., climb 20 ft.
ChallengeCR 1/2 (100 XP)
STR
3
(-4)
DEX
13
(+1)
CON
10
(+0)
INT
1
(-5)
WIS
7
(-2)
CHA
1
(-5)
Resistancesbludgeoning, piercing, slashing
Cond. ImmuneCharmed, Frightened, Grappled, Paralyzed, Petrified, Prone, Restrained, Stunned
Sensesblindsight 10 ft., passive Perception 8
Special Abilities
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 Weapon Attack: +3 to hit, reach 0 ft., one target in the swarm's space. Hit: 10 (4d4) piercing damage, or 5 (2d4) piercing damage if the swarm has half of its hit points or fewer.

Running Swarm of Beetles in an encounter

As a CR 1/2 threat worth 100 XP, Swarm of Beetles is a fair challenge for a party of four at a comparable level. With no legendary actions it works best in numbers or paired with support, where its CR 1/2 rating won't be burned down in a single round. Use the XP value with the encounter builder to slot it into a balanced fight.

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