Swarm of Diseased Rats

Medium swarm of tiny beasts, unaligned

Armor Class 10

Hit Points 24 7d8-7

Speed 30ft

STR

9 -1

DEX

11 0

CON

9 -1

INT

2 -4

WIS

10 0

CHA

3 -4

Skills darkvision 30 ft., passive Perception 10

Damage Resistances bludgeoning, piercing, slashing

Condition Immunities charmed, frightened, grappled, paralyzed, petrified, prone, restrained, stunned

Challenge 1/4 (50 XP)

Keen Smell. The swarm has advantage on Wisdom (Perception) checks that rely on smell.
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.

Actions

Bites. Melee Weapon Attack: +2 to hit, reach 0 ft., one target in the swarm's space. Hit: 7 2d6 piercing damage, or 3 1d6 piercing damage if the swarm has half of its hit points or fewer. If the target is a creature, it must succeed on a DC 10 Constitution saving throw or contract a disease. Until the disease is cured, the target can’t regain hit points except by magical means, and the target’s hit point maximum decreases by 3 (1d6) every 24 hours. If the target’s hit point maximum drops to 0 as a result of this disease, the target dies.