Wererat

Keen Smell. The wererat has advantage on Perception checks that rely on smell.

Pack Tactics. The wererat has advantage on attack rolls against a creature if at least one of the wererats allies is within 5 feet of the creature and not incapacitated.

Wolfsbane. Lycanthropes are repelled by the wolfsbane flower. A lycanthrope in hybrid or beast form is poisoned while within 10 feet of a living or dried wolfsbane flower that it can smell. If wolfsbane is applied to a weapon or ammunition, lycanthropes are damaged by the weapon as if it were silver. An application of wolfsbane lasts for 1 hour.

Shortsword (Humanoid or Hybrid Form Only). Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) piercing damage or 12 (3d6 + 2) piercing damage if the attack is made with advantage.

Hand Crossbow (Humanoid or Hybrid Form Only). Melee or Ranged Weapon Attack: +4 to hit, range 30/120 ft., one target. Hit: 5 (1d6 + 2) piercing damage or 12 (3d6 + 2) piercing damage if the attack is made with advantage.

Bite (Rat or Hybrid Form Only). Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 4 (1d4 + 2) piercing damage. If the target is a humanoid it makes a DC 11 Constitution saving throw. On a failure it is cursed with wererat lycanthropy.

Shapeshift. The wererat changes its form to a giant rat, a rat-humanoid hybrid, or into its true form, which is a humanoid. While shapeshifted, its statistics are unchanged. It can't speak in rat form. Its equipment is not transformed. It reverts to its true form if it dies.

Frenzied Bite (While Bloodied. The wererat makes a bite attack.