Giant Rat

Small beast, unaligned

Armor Class 12

Hit Points 7 (2d6)

Speed 30ft.

Senses darkvision 60ft., passive Perception 10

Languages -

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 5ft of the creature and the ally isn't incapacitated.

Actions

Bite

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

Variant: Diseased Giant Rats

Some giant rats carry vile diseases that they spread with their bites. A diseased giant rat has a challenge rating of 1/8 (25 XP) and the following action instead of its normal bite attack.

Bite. Melee Weapon Attack: +4 to hit, reach 5ft., one target.
Hit: 4 (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.