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Rat

Tiny Beast, unaligned

CR 0

10 XP

AC: 10
HP: 1 (1d4-1)
Speed: walk 20 ft.
Senses: darkvision 30 ft., passive Perception 10
Languages:
STR
2
-4
DEX
11
+0
CON
9
-1
INT
2
-4
WIS
10
+0
CHA
4
-3

Special Abilities

Keen Smell

The rat has advantage on Wisdom (Perception) checks that rely on smell.

Actions

Bite

Melee Weapon Attack: +0 to hit, reach 5 ft., one target. Hit: 1 piercing damage.

Quick Reference

Challenge: CR 0
Type: Beast
Size: Tiny
Alignment: unaligned
Best for a party of 4 at level 1, primarily as environmental flavor or when encountered in groups of 15+

Running This Encounter

Rats are best used in swarms rather than individually, as a single rat poses virtually no threat to adventurers. Use them to create atmosphere in dungeons, sewers, and urban environments, or as a prelude to a larger encounter. They can serve as a distraction, a source of disease, or as the minions of a larger creature like a giant rat or rat king. Consider environmental hazards that accompany rat infestations, such as slippery surfaces or collapsing structures weakened by their tunneling.

Combat Tactics

Rats flee from confrontation unless cornered or defending a nest, prioritizing escape over combat. When forced to fight, they attack the nearest target with their bite, but their minimal damage output means they are only dangerous in overwhelming numbers. Use swarms of 10+ rats to pose any meaningful threat, relying on pack behavior and swarming tactics rather than individual prowess.

Environment & Setting

Rats thrive in urban settings, dungeons, sewers, caves, and anywhere with available food and darkness. They are commonly found in abandoned buildings, granaries, ships, and underground settlements where they can establish colonies.