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Monster · SRD 5.1

Giant Rat (Diseased)

Small beast, unaligned

Armor Class
12
Hit Points
7 (2d6)
Speed
30 ft.
STR
7 (-2)
DEX
15 (+2)
CON
11 (+0)
INT
2 (-4)
WIS
10 (+0)
CHA
4 (-3)
Senses
darkvision 60 ft., passive perception 10
Challenge
1/8 (25 XP)

Traits

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

Pack Tactics. The rat has advantage on an attack roll against a creature if at least one of the rat's allies is within 5 ft. of the creature and the ally isn't incapacitated.

Actions

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 3 (1d4 + 2) piercing damage. 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.

Small beast, unaligned

Special Abilities

Keen Smell

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

Pack Tactics

The rat has advantage on an attack roll against a creature if at least one of the rat's allies is within 5 ft. of the creature and the ally isn't incapacitated.

Actions

Bite

Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 3 (1d4 + 2) piercing damage. 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.

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This work includes material taken from the System Reference Document 5.1 (“SRD 5.1”) by Wizards of the Coast LLC and available at https://dnd.wizards.com/resources/systems-reference-document. The SRD 5.1 is licensed under the Creative Commons Attribution 4.0 International License available at https://creativecommons.org/licenses/by/4.0/legalcode.

Reformatted and reorganized for presentation on PostRoll; text unmodified.

Licensed under Creative Commons Attribution 4.0 International.

srd-5.1 · Version 1.0.0 · Updated Jul 9, 2026