Wererat, Rat Form is a Small monstrosity with lawful evil alignment and Challenge Rating 2 in the 2024 SRD. This stat block includes AC 13, 60 hit points, speeds, traits, and actions.
Multiattack - The wererat makes two attacks, using Scratch or Hand Crossbow in any combination. It can replace one attack with a Bite attack.
Bite - Melee Attack Roll: +5, reach 5 ft. Hit: 8 (2d4 + 3) Piercing damage. If the target is a Humanoid, it is subjected to the following effect. Constitution Saving Throw: DC 11. Failure: The target is cursed. If the cursed target drops to 0 Hit Points, it instead becomes a Wererat under the GM’s control and has 10 Hit Points. Success: The target is immune to this wererat’s curse for 24 hours.
Scratch - Melee Attack Roll: +5, reach 5 ft. Hit: 6 (1d6 + 3) Slashing damage.