Rat Swarm

A squirming, roiling mass of squeaking rats draws closer, teeth flashing and claws scratching everything in its path.

Rat Swarm CR 2

XP 600

N Tiny animal (swarm)

Init +6; Senses low-light vision, scent; Perception +8


AC 14, touch 14, flat-footed 12 (+2 Dex, +2 size)

hp 16 (3d8+3)

Fort +4, Ref +5, Will +2

Defensive Abilities swarm traits


Speed 15 ft., climb 15 ft., swim 15 ft.

Melee swarm (1d6 plus disease)

Space 10 ft.; Reach 0 ft.

Special Attacks disease, distraction (DC 12)


Str 2, Dex 15, Con 13, Int 2, Wis 13, Cha 2

Base Atk +2; CMB —; CMD

Feats Improved Initiative, Skill Focus (Perception)

Skills Acrobatics +6, Climb +10, Perception +8, Stealth +14, Swim +10; Racial Modifiers uses Dex to modify Climb and Swim


Environment any

Organization solitary, pack (2–5 swarms), or infestation (6–12 swarms)

Treasure none

Special Abilities

Disease (Ex) Filth fever: Swarm—injury; save Fort DC 12; onset 1d3 days; frequency 1/day; effect 1d3 Dex damage and 1d3 Con damage; cure 2 consecutive saves. The save DC is Constitution-based.

A rat swarm typically consists of a biting, roiling mass of hundreds of disease-ridden rats driven to uncharacteristic heights of aggression by fantastic and overwhelming hunger. In such numbers, they become voracious hunters, capable of killing a full-grown human with hundreds of bites. Rat swarms are often found in the sewers of large human settlements.

Rat swarms surround and attack any warm-blooded prey in their path.