Wererat
Small monstrosity, lawful evil
Armor Class 13 (natural armor)
Hit Points 60 (11d8 + 11)
Speed 30 ft., swim 15 ft., climb 30 ft.
str
10 (+0)
dex
16 (+3)
con
12 (+1)
int
11 (+0)
wis
10 (+0)
cha
8 (-1)
Skills Perception +4, Stealth +5
Senses darkvision 60 ft., passive Perception 14
Languages Common (can't speak in rat form)
Challenge 2 (450 XP)
Actions
Bite . Melee Attack Roll: +5, reach 5 ft. 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 DM's control and has 10 Hit Points. Success: The target is immune to this wererat's curse for 24 hours.
Hand Crossbow. Ranged Attack Roll: +5, range 30/120 ft. 6 (1d6 + 3) Piercing damage.
Multiattack. The wererat makes two attacks, using Scratch or Hand Crossbow in any combination. It can replace one attack with a Bite attack.
Scratch. Melee Attack Roll: +5, reach 5 ft. 6 (1d6 + 3) Slashing damage.